Suparno, A., A. Kasasiah, and D. Ratnasari. “Isolation of Escherichia Coli in Raw Water Sources and Resistance Assay for Ampicillin and Ceftriaxone”. Journal of Pharmaceutical And Sciences, Vol. 5, no. 2, Nov. 2022, pp. 265-73, doi:10.36490/journal-jps.com.v5i2.139.