Fauziah, Rizky. “EXPERT SYSTEM APPLICATION TO DIAGNOSE ESCHERICHIA COLI (E-COLI) BACTERIA IN REFILLED DRINKING WATER USING THE CERTAINTY FACTOR METHOD”. INFOKUM 9, no. 2, June (June 6, 2021): 159-164. Accessed April 17, 2024. http://infor.seaninstitute.org/index.php/infokum/article/view/107.