Shamsudin, ¹Ahmad F., I. Z. Abidin, and J. Hashim. “Inter-State Burden Cost Model and Their Management for Waqf Financing of Higher Education”. Al-Qimah Al-Mudhafah, vol. 1, no. 1, Dec. 2015, pp. 1-12, http://jurnal.usas.edu.my/alqimah/index.php/journal/article/view/4.