“EVALUATION OF SLUDGE FROM COAGULATION OF PALM OIL MILL EFFLUENT WITH CHITOSAN BASED COAGULANT”. Jurnal Teknologi (Sciences & Engineering) 78, no. 5-4 (May 9, 2016). Accessed April 29, 2025. https://journals.utm.my/jurnalteknologi/article/view/8529.