Abdullah, Zaki, Dinda Aisyah Najmi, and Duddy Roesmara Donna. “Measuring Amil Happiness Using Psychological Approach: Evidence from Yogyakarta, Indonesia”. International Journal of Zakat 4, no. 2 (December 12, 2019): 13–22. Accessed May 1, 2026. https://mail.ijazbaznas.com/index.php/journal/article/view/188.