Durrah, Omar, Adnan Al-Tobasi, Ashraf A’aqoulah, and Moinuddin Ahmad. 2016. “The Impact of the Psychological Capital on Job Performance: A Case Study on Faculty Members at Philadelphia University”. International Review of Management and Marketing 6 (2):183-91. https://econjournals.com./index.php/irmm/article/view/1964.