Faramita Hiola, et al. “Antioxidant Activity Evaluation Of Catfish (Clarias Sp.) Collagen Extract Using DPPH And ABTS Methods”. Qoumun: Journal of Social and Humanities, vol. 1, no. 2, Dec. 2025, pp. 114-20, doi:10.65097/qoumun.v1i2.72.