Mohd Nor, R. (2013). PENGURUSAN BAITUMAL ERA PEMERINTAHAN KHALIFAH UMAR BIN ABDUL AZIZ (Management of Treasury During Era the Reign of Caliph Umar bin Abdul Aziz). Journal of Al-Tamaddun, 8(2), 81–88. Retrieved from http://ojie.um.edu.my/index.php/JAT/article/view/8663