Muda, Muhamad, Ainulashikin Marzuki, and Amir Shaharuddin. “Internal and External Factors Influencing Individual’s Participation in Zakat: Preliminary Results”. The Journal of Muamalat and Islamic Finance Research 2, no. 1 (January 1, 2005): 77–92. Accessed February 12, 2026. https://jmifr.usim.edu.my/index.php/jmifr/article/view/38.