Suwandi, Ruddy, JacoebAgoes Mardiono, and Maya Sofia. 2015. “Application of Ultrasonic Waves on Maintaining Freshness of Tilapia Fillet”. Jurnal Pengolahan Hasil Perikanan Indonesia 18 (1). Bogor, ID. https://doi.org/10.17844/jphpi.v18i1.9563.