Ghazali, N., I. Sipan, F. Abas, R. Fauziah, and M. Mohammad. “Concept of Valid Contract Declaration of Waqf Property in Islamic Law”. Journal of Fatwa Management and Research, vol. 16, no. 2, Oct. 2019, pp. 181-06, doi:10.33102/jfatwa.vol16no2.15.