“Kajian Proses Fermentasi Urin Sapi dengan Beberapa Model Diffuser”, JBETA, vol. 11, no. 2, hlm. 392–401, Sep 2023, Diakses: Sep 20, 2026. Tersedia pada: https://ejournal3.unud.ac.id/index.php/beta/article/view/2806