Yaakub, F., and A. H. Buang. “KEDUDUKAN JANJI DALAM UNDANG-UNDANG ISLAM DAN AKTA KONTRAK 1950: Status of Promise in Shariah Law and Contract Act 1950”. Journal of Shariah Law Research, vol. 2, no. 1, Jan. 2017, pp. 1-20, doi:10.22452/http://doi.org/10.22452/JSLR.vol2no1.1.