UJI VALIDITAS E-MODUL BERBASIS PROBLEM BASED LEARNING MENGGUNAKAN HEYZINE PADA MATERI ASAM BASA FASE F SMA/MA. BIOCHEPHY:JSE. 2025;5(2):1053-1059. Accessed November 10, 2026. https://www.journal.moripublishing.com/index.php/biochephy/article/view/1805