Ratnasari, Indri, Sudarti Sudarti, and Yushardi Yushardi. 2021. “Pengaruh Paparan Medan Magnet Extremely Low Frequency (ELF) Terhadap Derajat Keasaman (pH) Susu Sapi Segar”. Jurnal Pijar Mipa 16 (2):276-81. https://doi.org/10.29303/jpm.v16i2.2478.