Husayn, B. J., A. Ab Rahman, and M. Z. Zakaria. “Awqaf Sukuk, It’s Concept And Legitimate Adaptation”. Perdana: International Journal of Academic Research, Vol. 3, no. 1, Dec. 2018, pp. 61-79, http://perdanajournal.com/index.php/perdanajournal/article/view/29.