Zulfa Aqilaah Fitria, et al. “Effect of Fermentation Time on Biogas Composition from Palm Oil Mill Effluent (POME) ”. Journal of Industrial, Energy and Environment Technology, vol. 3, no. 1, Nov. 2025, pp. 107-11, https://doi.org/10.36257/jieetech.v3i1.10987.