Amalia Yulianti, Liswara Neneng, and Yohanes Edy Gunawan. “Pengaruh Lama Paparan Dan Frekuensi Gelombang Ultrasonik Terhadap Jumlah Koloni Escherichia Coli”. Journal of Environment and Management 2, no. 2 (May 27, 2021): 99–105. Accessed April 2, 2025. https://e-journal.upr.ac.id/index.php/jem/article/view/2937.