“The Effect of Microwave Oven Power Variations on Co-Pyrolysis Process of Oil Palm Shells and Polystyrene: Pengaruh Variasi Daya Microwave Oven Terhadap Proses Co-Pirolisis Cangkang Kelapa Sawit Dan Polistirena ”. 2022. Procedia of Social Sciences and Humanities 3 (May): 34-40. https://doi.org/10.21070/pssh.v3i.193.