Sisca, V. “PENENTUAN KUALITAS AIR MINUM ISI ULANG TERHADAP KANDUNGAN NITRAT, BESI, MANGAN, KEKERUHAN, Ph, BAKTERI E.Coli DAN COLIFORM”. Chempublish Journal, vol. 1, no. 2, Nov. 2016, pp. 21-31, https://online-journal.unja.ac.id/chp/article/view/3310.