Ibrahim, S. S. ., A. H. Mohd Noor, S. Ismail, and M. A. Muhamad Don. “Performance of Waqf Cross-Sector Collaboration:A Systematic Literature Review (SLR) Approach”. Journal of Muwafaqat, vol. 2, no. 2, Dec. 2019, pp. 93-103, https://muwafaqat.uis.edu.my/index.php/journal/article/view/33.