Basir, Siti Arni, Mohd. Farid Mohd. Sharif, and Raja Hisyamudin Raja Sulong. 2008. “Iso 9000 from Islamic Perspective”. Jurnal Usuluddin 28 (December):139-58. https://jrmg.um.edu.my/index.php/JUD/article/view/7275.