Abdul Karim, A. (2004). Re-refining of base oil from spent lubricant: A comparative study between laboratory and pilot scale study.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Abdul Karim, Azila. Re-refining of Base Oil from Spent Lubricant: A Comparative Study Between Laboratory and Pilot Scale Study. 2004.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Abdul Karim, Azila. Re-refining of Base Oil from Spent Lubricant: A Comparative Study Between Laboratory and Pilot Scale Study. 2004.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.