Prastyo, Deny Tri, et al. “Aktivitas Antioksidan Hidrolisat Kolagen Kulit Ikan Nila (Oreochromis niloticus): Antioxidant Activity of Tilapia (Oreochromis Niloticus) Skin Collagen Hydrolizate”. Jurnal Pengolahan Hasil Perikanan Indonesia, vol. 23, no. 3, Nov. 2020, pp. 423-3, https://doi.org/10.17844/jphpi.v23i3.31732.