“Studi Pengaruh Waktu Kontak, Laju Alir, Dan Ukuran Packing Terhadap Adsorpsi Cr(VI)”. Chempublish Journal, vol. 2, no. 1, Aug. 2017, pp. 32-37, https://mail.online-journal.unja.ac.id/chp/article/view/3821.