Istiqomah, Iis, and Yasmine Nasution. “Leveraging Psychological Capital As a Personal Resource to Enhance Happiness at Work and Drive Extra-Role Behaviors”. Indonesian Interdisciplinary Journal of Sharia Economics (IIJSE) 8, no. 3 (October 16, 2025): 12446-12461. Accessed May 19, 2026. https://e-journal.uac.ac.id/index.php/iijse/article/view/7295.