Jefry, Jefry, et al. “Cellulase Hydrolyzed Indigofera Zolingeriana Leaf Utilization As a Feed Ingredient for Gourami Fingerling ”. Jurnal Akuakultur Indonesia, vol. 20, no. 2, Sept. 2021, pp. 139-47, https://doi.org/10.19027/jai.20.2.139-147.