Mahya Dewi, U. 2024. Training on the Preparation of Case Method and PJBL-Based Learning Tools as Strengthening 21st Century Skills . Jurnal Pengabdian Masyarakat Bestari. 3, 9 (Sep. 2024), 507–514. DOI:https://doi.org/10.55927/jpmb.v3i9.10684.