“UJI KANDUNGAN BAKTERI ESCHERICHIA COLI PADA AIR PDAM DONGGALA”, Faculty of Medicine, Tadulako University, P-ISSN: 2407-8441 and e-ISSN 2502-0749, vol. 2, no. 2, pp. 9–15, Jul. 2016, doi: 10.22487/htj.v2i2.26.