بنا, ح., & Alias Othman. (1988). Usul dua puluh. Pustaka Salam.
Chicago Style (17th ed.) Citationبنا, حسن, and Alias Othman. Usul Dua Puluh. Kuala Lumpur: Pustaka Salam, 1988.
MLA (9th ed.) Citationبنا, حسن, and Alias Othman. Usul Dua Puluh. Pustaka Salam, 1988.
Warning: These citations may not always be 100% accurate.