SPENT EDIBLE OIL SOAP ANALYSIS ON CHEMICAL PRACTICUM ACTIVITIES IN SMA HARAPAN III DELI SERDANG. JURNAL PENGMAS KESTRA (JPK), [S. l.], v. 2, n. 1, p. 11–15, 2022. DOI: 10.35451/jpk.v2i1.1038. Disponível em: https://ejournal.medistra.ac.id/index.php/JPK/article/view/1038. Acesso em: 6 dec. 2025.