AL-HINAI, Nasr, Sujan Piya, and Khalid Al-Wardi. “Analysis of Factors Affecting Motivation in Projects: A Case Study in Oil and Gas Industry in Oman”. The Journal of Engineering Research [TJER] 17, no. 2 (December 30, 2020): 112–125. Accessed February 25, 2021. https://journals.squ.edu.om/index.php/tjer/article/view/3644.