Masron, Z. “Palm Oil Mill Effluent (POME) Pretreatment Using Tapioca Starch As A Coagulant”. International Journal Of Technical Vocational And Engineering Technology, Vol. 4, no. 1, Dec. 2023, pp. 32-40, https://journal.pktm.com.my/index.php/ijtvet/article/view/100.