RANTONO, Satrio. UJI AKTIVITAS ANTIBAKTERI KEFIR SUSU KAMBING TERHADAP BAKTERI Propionibacterium acnes. INDONESIA NATURAL RESEARCH PHARMACEUTICAL JOURNAL, [S.l.], v. 5, n. 2, p. 20-30, sep. 2020. ISSN 2502-8421. Available at: <https://ojs3.binainsancerdas.com/index.php/INRPJ/article/view/1858>. Date accessed: 13 apr. 2026. doi: http://dx.doi.org/10.52447/inspj.v5i2.1858.