Abdullah, I., W. Wan Mahmood, M. Md Fauadi, and M. Ab Rahman. “BENEFITS OF REGULATORY AND VOLUNTARY SUSTAINABILITY STANDARDS COMPLIANCE: A REVIEW ON MALAYSIAN PALM OIL”. Journal of Advanced Manufacturing Technology (JAMT), Vol. 9, no. 1, 1, pp. 1-12, https://jamt.utem.edu.my/jamt/article/view/278.