Lestari, Fitri, Sri Wulandari, Rosalina Rosalina, Elia Fahmi Sella, dan Andini Andini. “Consumer Acceptance Level of Natural Coffee Soap Using Cold Process Technology Based on Type of Coffee Roasting”. Agroindustrial Technology Journal 7, no. 3 (Mei 19, 2024): 117–127. Diakses Desember 6, 2025. https://ejournal.unida.gontor.ac.id/index.php/atj/article/view/10545.