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توثيق أسلوب شيكاغو (الطبعة السابعة عشر)2-s2.0-85043334431. "Transesterification of Waste Cooking Oil in Biodiesel Production Utilizing CaO/Al2O3 Heterogeneous Catalyst; [Transesterifikasi Sisa Minyak Masak Dalam Pengeluaran Biodiesel Menggunakan CaO/Al2O3 Mangkin Heterogenus]." Malaysian Journal of Analytical Sciences 22, no. 1 (2018). https://doi.org/10.17576/mjas-2018-2201-20.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)2-s2.0-85043334431. "Transesterification of Waste Cooking Oil in Biodiesel Production Utilizing CaO/Al2O3 Heterogeneous Catalyst; [Transesterifikasi Sisa Minyak Masak Dalam Pengeluaran Biodiesel Menggunakan CaO/Al2O3 Mangkin Heterogenus]." Malaysian Journal of Analytical Sciences, vol. 22, no. 1, 2018, https://doi.org/10.17576/mjas-2018-2201-20.