“EVALUASI AKTIVITAS DAYA HAMBAT KEFIR UBI UNGU TERHADAP BAKTERI PATOGEN SELAMA PENYIMPANAN”, STAP, vol. 9, p. 356, Jun. 2022, Accessed: Oct. 29, 2025. [Online]. Available: https://jnp.fapet.unsoed.ac.id/index.php/psv/article/view/932