“PENGARUH PERBANDINGAN CAMPURAN 50% LIMBAH SAWIT DAN 50% KOTORAN SAPI TERHADAP PROSES TERJADINYA BIOGAS”. Injection: Indonesian Journal of Vocational Mechanical Engineering, vol. 1, no. 1, Feb. 2022, pp. 35-40, https://doi.org/10.58466/injection.v1i1.1350.