Alvandi, R. (2012). 'Nixon, Kissinger, and the Shah: the Origins of Iranian primacy in the Persian Gulf'. Diplomatic history, 36 (2), 337–372.
Asharq Al-Awsat, (2016). 'Saudi Arabia was against war on Iraq, Chiclot's Report,' Asharq Al-Awsat, Retrieved 2018, March, 3, From https://eng-archive. aawsat. com/ theaawsat/ news- middle- east/ saudi-arabia/ saudi-arabia-war-iraq-chiclots-report
Asr-e-Iran. (2014). 'First contract signed between Iran and Yemen’s Houthi government; establishment of 28 weekly flights between Sana’a and Tehran; Yemen’s president protests'. Retrieved 2018, Feb. 23, From:
http://www.asriran.com/fa/news/384989.
Baylis, J. (2011). 'The Globalization of World Politics', Oxford University Press Inc. p. 237. ISBN 978-0-19-956909-0.
Bazzi, M. (2018). 'The war in Yemen is disastrous. America is only making things worse', The Guardian. Retrieved 2018, Feb. 8, from: https://www.theguardian. com/ commentisfree/ 2018/jun/11/trump-yemen-saudi-arabi-war-us-involvement-worsening-crisis
Byman, D.L. (2013). 'The Resurgence of al Qaeda in Iraq'. Brookings. Retrieved 2018, March. 18, From: https://www.brookings.edu/testimonies/the-resurgence-of-al-qaeda-in-iraq/
Choi, A. (2003). 'The Power of Democratic Cooperation'. International security, 28, 145-153.
Chomsky, N. (2005). 'Imperial Presidency', Canadian Dimension, 39 (1), 8.
Ekhtiari, A.R- Hasnita B- Samsu K- and Gholipour Fereidouni, H. (2011). 'The Hajj and Iran's Foreign Policy towards Saudi Arabia'. Journal of Asian and African Studies, 46 (678).
El-Hokayem,E. (2007). 'Hizballah and Syria: Outgrowing the Proxy Relationship', the Washington Quarterly, 30(2). 52–35.
Enayat, H (1982). Modern Islamic Political Thought, Austin, University of Texas Press.
Fearon, J and Wendth, A. (2005). 'Rationalism V. Constructivism: A skeptical View', in Handbook of International Relations, London: Sage Publication.
Goodarzi, J. (2006). 'Syria and Iran: diplomatic alliance and power politics in the Middle East.' New York: Tauris Academic Studies.
Hameed, U. (2017). 'The Saudi-Iranian Rivalry: A Foreign Policy Analysis Approach'. Towson University Journal of International Affairs, 27.
Hampton, K. (2014). 'Doctrinally and Politically Opposed on the Battlefield in Syria: Iran and Saudi Arabia’s Cold War in the Middle East. ' Merton Press.18-1.
Hauslohner, A. (2013).' Iraqi Shiites fight for Syrian government'. The Washington Post. Retrieved 2018, March. 10, From:
Hegghammer, T. (2007). 'Saudi Militants in Iraq: Backgrounds and Recruitment Patterns', derived from a PhD project, Norwegian Defense Research Establishment, 10-15.
Hegghammer, T. (2008). 'Saudis in Iraq: Patterns of Radicalization and Recruitment', Cultures & Conflicts, 10.
Katzman, K. (2012). 'Bahrain: Reform, Security, and U. S. Policy.' Congressional Research Service.
Katzman, K. (2014). 'Iraq: Politic, Governance, and Human Rights.' Congressional Research Service (CRS) Report for Congress.
Leverett, F. (2005). 'Inheriting Syria Bashar’s Trial by Fire', Brookings Institution Press Washington, D.C.
Madawi, A. R. (2011). 'The Saudi Complex: Power VS Rights'. Retrieved 2017, Oct. 1, from: https://www.opendemocracy.net/madawi-al-rasheed/saudi-complex-power-vs-rights.
Niblock, T. (2006). 'Saudi Arabia: Power, Legitimacy and Survival', London, New York, Rutledge.
Obaid, N and Anthony C. (2005). 'Saudi Militants in Iraq: Assessment and Kingdoms Response', Center for Strategic & International studies.
Ostovar, A. (2018) 'The First Saudi-Iranian War Will Be an Even Fight'. Foreign Policy. Retrieved 2018, Nov. 2, From: https://foreignpolicy.com/2018/05/07/the-first-saudi-iranian-war-will-be-an-even-fight/
Peterson, J. E. (1991). 'The Arabian Peninsula in Modern Times', A Historiographical Survey.
Risse, T. (2000). 'Let's Argue: Communicative Action in World Politics'. International Organization 54(1): 1-39.
Ruggie, J.G. (1998). 'Constructing the World Polity: Essays on International Institutionalization', London and New York: Routledge.
Rydell, M. (2017). 'Syria: Iran's and Saudi Arabia's new playground?: A case study of Iran’s and Saudi Arabia’s involvement in the Syrian Civil War', LUP Student Papers, Lund University, 17.
Sadeghi, H. Ahadian, H. (2010). 'Transformation of Yemen’s regional status: opportunities & challenges', Rahbord Quarterly; 19 (56): 253-280.
Samii, A.W. (2008). 'A Stable Structure on Shifting Sands: Assessing the Hezbollah-Iran-Syria Relationship', The Middle East Journal, 62(1), 32-53.
Spetalnick, M, Mason, J, and Julia E. (2014). 'Saudi Arabia agrees to host training of moderate Syria rebels'. Reuters. Retrieved 2017, Nov.2, from: https://www.reuters. com/ article/ us-iraq-crisis-obama-saudi/ saudi-arabia- agrees-to-host-training-of-moderate-syria-rebels-idUSKBN0H51QC20140911
Sun, D. (2009). 'Brothers Indeed: Syria-Iran Quasi-alliance Revisited', Journal of Middle Eastern and Islamic Studies (in Asia), 3(2): 67-80.
Wendth, A. (1999). 'Social theory of International Politics', Cambridge: Cambridge University press.
Wind, M. (1997). 'Nicholas G. Onuf: The Rules of Anarchy', in The Future of International Relations: Masters in the Marketing?, ed. Iver B. Neumann and Ole Waever (London and NewYork: Routledge), 254-267.
World Atlas, (2018), 'Geography Of The Middle East', from: https://www. worldatlas. com/ webimage/countrys/me.htm
Wright, R. (2000). 'The last great revolution: Turmoil and Transformation in Iran'. Knopf, New York.
Zakaria, F. (2018). 'There is a lot to be optimistic about these days. And then there is the Middle East', The Washinton Post. Retrieved 2018, Sept. 12, from: https:// www. washingtonpost.com/opinions/theres-a-lot-to-be-optimistic-about-these-days-and-then-theres-the-middle-east/ 2018/02/15/49c7048c-128f-11e8-8ea1-c1d91fcec3fe_ story.html
Zehfuss, M. (2001). 'Constructivism and Identity, a Dangerous Liaison', European Journal of International Relations, 7(3). 315-348.
Zeraatpisheh, N. (2005). 'Saudi Arabia’s strategic estimation', Tehran Abrar Mo’aser Cultural International Institution.