Ahmad Nasrullah Mohd Ghazali. (2009). Design and manufacturing process of the housing of rotary valve for motorcycle engine. School of Manufacturing Engineering, University Malaysia Perlis.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Ahmad Nasrullah Mohd Ghazali. Design and Manufacturing Process of the Housing of Rotary Valve for Motorcycle Engine. Perlis, Malaysia: School of Manufacturing Engineering, University Malaysia Perlis, 2009.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Ahmad Nasrullah Mohd Ghazali. Design and Manufacturing Process of the Housing of Rotary Valve for Motorcycle Engine. School of Manufacturing Engineering, University Malaysia Perlis, 2009.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.