-Al-Rashid, Madawi(April 23, 2018), “What Fuels the Saudi Rivalry With Iran?”, The Nytimes, at: https://www.nytimes.com/2018/04/23/opinion/international-world/saudi-iran-prince-mohammed.html
-BP (2018), Statistical Review of World Energy, at: https://www.bp.com/content/dam/bp/en/corporate/pdf/energy-economics/statistical-review/bp-stats-review-2018-full-report.pdf
-CNN (2018), “Trump's $110 billion Saudi arms deal has only earned $14.5 billion so far”, at: https://edition.cnn.com/2018/10/12/politics/trump-khashoggi-saudi-arabia-arms-deal-sanctions/index.html
-Cordesman, Anthony H.(2015), “America, Saudi Arabia, and the Strategic Importance of Yemen”, Center for Strategic and International Studies (CSIS), pp. 1-9
-Cordesman, Anthony H. (2015), “Yemen and Warfare in Failed States”, Center for Strategic and International Studies, pp. 1-7
- David, S. R. (1991), “Explaining Third World Alignment”, World Politics, 43(02), 233–256.
-Dazi‐Heni, Fatiha, (2014), “Saudi Leadership in a Chaotic Middle Eastern Context”, Analysis No.279.
-Devine, James, (2017), “Lessons from the Past: The Saudi Iranian Crisis in Historical Perspective,” Canadian Political Science Association Annual Conference, Toronto.
- Deutsche Welle Farsi(2018), “Iran-Saudi need new security architecture”, at: https://www.dw.com/fa-ir
-Dobbins, James et. al. (2015), “A Peace Plan for Syria”, RAND Corporation, pp. 1-11
-Fathollah Nejad, Ali, (2017), “The Iranian–Saudi Hegemonic Rivalry”, Belfer Center for Science and International Affairs,p. 3-5
- Fa.euronews(2018), “If Saudi Arabia would be attacked, Iran is the first one rush to support it”, at: https://fa.euronews.com/2018/03/14/zarif-iran-will-support-saudis-in-case-of-foreign-aggression
-Feierstein, Gerald, (2017), “U.S.-Gulf Relations in the Age of Trump; The End of the Trust Deficit?”, Middle East Institute, pp. 1-11
-Gasiorowski, Mark J. (2000), “The Power Struggle in Iran”, Middle East Policy, Vol. VII, No. 4, pp. 1-15.
-Goldberg. Jeffrey (2018), “Saudi Crown Prince: Iran's Supreme Leader 'Makes Hitler Look Good”, The Atlantic, at: https://www.theatlantic.com/international/archive/2018/04/mohammed-bin-salman-iran-israel/557036
-Jamaran Farsi(2019), “Iran is open to dialogue to the regional states”, at: https://www.jamaran.ir
-Lobell, Steven E. Lobell and Jeffrey W. Taliaferro(2009), Neoclassical realism state and foreign policy, Cambridge University Press.
-Mojtahed Zadeh, Pirouz, (1996), “The Issue of the UAE Claims to Tunbs and Abu Musa vis-a-vis Arab-Iranian Relations in the Persian Gulf,” The Iranian Journal of International Affairs, Vol. VIII, No.3.
-Postel, Danny & Hashemi. Nader (2018), “Playing with Fire: Trump, the Saudi-Iranian Rivalry, and the Geopolitics of Sectarianization in the Middle East”, The Middle East 4 Change, at: http://www.middleast4change.org/playing-with-fire-trump-the-saudi-iranian-rivalry-and-the-geopolitics-of-sectarianization-in-the-middle-east/
-Rose, G. (1998), “Neoclassical realism and theories of foreign policy”, World politics, 51(1), 144-172.
-Salimi, Hussein and Ebrahimi, Monar, (2013), “Theoretical Foundations, Meta-analysis and Critique of Neoclassical Realism Theory”, Quarterly Journal of International Relations, Vol. 5. No. 17. PP. 42-13.
-Shaheen, Kareem. (2018). “Saudi Arabia and Iran's rivalry is key to the Middle East in 2018”,The Guardian, at: https://www.theguardian.com/world/2018/jan/04/2018-saudi-arabia-iran-rivalry-key-middle-east-year-ahead
- Sprecher,C.and Krause,Volker(2006), “Alliances, Armed Conflict, and Cooperation: Theoretical Approaches and Empirical Evidence”, Journal of Peace Research, 43(4), 363–369.
-Tang, S. (2008), “Fear in international politics: two positions”, International Studies Review, 10(3), 451-471.
- “Trump statement on Nov. 20, 2018”, at: https://www.whitehouse.gov/briefings-statements/statement-president-donald-j-trump-standing-saudi-arabia/
-Walt, S. M. (1992). “Alliances, Threats, and U.S. Grand Strategy: A Reply to Kaufmann and Labs”, Security Studies, 1 (3), pp. 448–482
-Wohlfarth, W. (1996), “Redefining security: Russia's intellectual adjustment to decline”, Harvard International Review, 19(1), 10.
-World Economic Forum(2018), “What you need to know about global arms sales in 6 charts”, at: https://www.weforum.org/agenda/2018/03/what-you-need-to-know-about-global-arms-sales-in-6-charts/
-Zarif, M. J. (2016), “Mohammad Javad Zarif: Let Us Rid the World of Wahhabism”, at: https://www.nytimes.com/2016/09/14/opinion/mohammad-javad-zarif-let-us-rid-the-world-of-wahhabism.html