SyahputraG., HariyatunH., FirdausM., and SantosoP. “Extraction and Characterization of Collagen from Sand Sea Cucumber (Holothuria Scabra)”. Jurnal Ilmu Pertanian Indonesia, Vol. 26, no. 3, June 2021, pp. 319-27, doi:10.18343/jipi.26.3.319.