توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Muhamad Abu Bakar. (1992). A study of cholesteatoma cases in the department of otorhinolaryngology Universiti Kebangsaan Malaysia January 1979 - June 1990. Universiti Kebangsaan Malaysia.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Muhamad Abu Bakar. A Study of Cholesteatoma Cases in the Department of Otorhinolaryngology Universiti Kebangsaan Malaysia January 1979 - June 1990. Kuala Lumpur: Universiti Kebangsaan Malaysia, 1992.

توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)

Muhamad Abu Bakar. A Study of Cholesteatoma Cases in the Department of Otorhinolaryngology Universiti Kebangsaan Malaysia January 1979 - June 1990. Universiti Kebangsaan Malaysia, 1992.