Ginting, N., H. Hasnudi, and Y. Yunilas. “Eco-Enzyme Disinfection in Pig Housing As an Effort to Suppress Esherechia Coli Population”. Jurnal Sain Peternakan Indonesia, vol. 16, no. 3, Sept. 2021, pp. 283-7, https://ejournal.unib.ac.id/jspi/article/view/15410.