F. Fatimah, Maya Istyadji, and Y. I. Fatimah, “Aktivitas Antibakteri Sabun Organik Berbasis Ekstrak Kopi Robusta (Coffea canephora) Terhadap Escherichia coli ATCC 8739”, JIBS, vol. 12, no. 1, pp. 17–26, Jun. 2026.