Ahmed, Mahdi Shihab. “The Existential Vacuum and Its Relationship to the Two Personality Types (A-B) Among University Students”. Journal of Tikrit University for Humanities 29, no. 7, 2 (July 30, 2022): 418–447. Accessed April 28, 2025. https://jtuh.org/index.php/jtuh/article/view/134.