Wan Abdullah, Wan Suhaimi. 2001. “Gerd R. Puin, Observations on Early Qur’an Manuscripts in Sana’a’, (5 Hlm.) Dalam Stefan Wild, (Ed.) The Qur’an As Text, (Leiden - New York - Koln: E.J. Brill, 1996)”. Jurnal Usuluddin 13 (June):153-56. https://ajap.um.edu.my/index.php/JUD/article/view/4019.