Pinangkaan, M. “PERMODELAN PENGOLAHAN AIR LIMBAH (GREY WATER) INDUSTRI RUMAH TANGGA”. Jurnal Tugas Akhir Teknik Sipil, Vol. 3, no. 2, Sept. 2019, pp. 140 -49, https://ojs.poltekba.ac.id/ojs/index.php/jutateks/article/view/205.