Hassan, M. (1974). Certain aspects of the cultural life of the Muslims in Tawi-TAwi and how this is reflected in some drawings of Grade I and II children: 1970-1972 [microform]. Photoduplication Service. University of the Philippines Library.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Hassan, Mahmud. Certain Aspects of the Cultural Life of the Muslims in Tawi-TAwi and How This Is Reflected in Some Drawings of Grade I and II Children: 1970-1972 [microform]. Quezon City: Photoduplication Service. University of the Philippines Library, 1974.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Hassan, Mahmud. Certain Aspects of the Cultural Life of the Muslims in Tawi-TAwi and How This Is Reflected in Some Drawings of Grade I and II Children: 1970-1972 [microform]. Photoduplication Service. University of the Philippines Library, 1974.