توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Ahmad Hafiz Bin Zulkifly. (2000). The experience of total knee arthroplasty in Hospital Kuala Lumpur and Universiti Kebangsaan Malaysia: January 1986 to December 1997. Universiti Kebangsaan Malaysia.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Ahmad Hafiz Bin Zulkifly. The Experience of Total Knee Arthroplasty in Hospital Kuala Lumpur and Universiti Kebangsaan Malaysia: January 1986 to December 1997. Selangor Darul Ehsan: Universiti Kebangsaan Malaysia, 2000.

توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)

Ahmad Hafiz Bin Zulkifly. The Experience of Total Knee Arthroplasty in Hospital Kuala Lumpur and Universiti Kebangsaan Malaysia: January 1986 to December 1997. Universiti Kebangsaan Malaysia, 2000.