Ratnasari, Indri, Sudarti Sudarti, and Yushardi Yushardi. “Pengaruh Paparan Medan Magnet Extremely Low Frequency (ELF) Terhadap Derajat Keasaman (pH) Susu Sapi Segar”. Jurnal Pijar Mipa 16, no. 2 (March 13, 2021): 276–281. Accessed April 25, 2024. https://jurnalfkip.unram.ac.id/index.php/JPM/article/view/2478.