A.H, H., M.M, Z., K.R, Z., N.Q, S., M.A, M. Y., N.A, R., & N.A.N, M. N. A. (2022). Sulfonated Carbon Catalyst Prepared from Calcination of Lignin for Ethyl Levulinate Synthesis via Ethanolysis of Levulinic Acid. Chemical Engineering Transactions, 97, . https://doi.org/10.3303/CET2297052
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)A.H, Hassan, Zainol M.M, Zainuddin K.R, Saperi N.Q, Mohammed Yussuf M.A, Rahman N.A, و Mohd Nor Azman N.A.N. "Sulfonated Carbon Catalyst Prepared from Calcination of Lignin for Ethyl Levulinate Synthesis via Ethanolysis of Levulinic Acid." Chemical Engineering Transactions 97 (2022). https://doi.org/10.3303/CET2297052.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)A.H, Hassan, et al. "Sulfonated Carbon Catalyst Prepared from Calcination of Lignin for Ethyl Levulinate Synthesis via Ethanolysis of Levulinic Acid." Chemical Engineering Transactions, vol. 97, 2022, https://doi.org/10.3303/CET2297052.