Pembuatan Sabun dari Minyak Jelantah di Bank Minyak Jelantah Rumbai. Harmoni Masyarakat, [S. l.], v. 2, n. 1, p. 72–79, 2024. Disponível em: https://journal.unilak.ac.id/index.php/Harmoni/article/view/22535. Acesso em: 6 may. 2026.