Trimayanti, Ni Luh, et al. “Study of Cow Urine Fermentation Process With Several Diffuser Models ”. Jurnal BETA (Biosistem Dan Teknik Pertanian), vol. 11, no. 2, Sept. 2023, pp. 392-01, doi:10.24843/JBETA.2023.v11.i02.p17.