Matondang, Santa Ronauli, et al. “Contamination With Escherichia Coli in Jumbo Iced Tea Sold on Ayahanda Street, Medan: A Most Probable Number (MPN) Approach”. Buletin Kedokteran & Kesehatan Prima, vol. 5, no. 2, June 2026, pp. 131-6, doi:10.34012/bkkp.v5i2.8422.