Lismayuni, Lismayuni, Vandalita MM. Rambitan, and Sonja VT Lumowa. “THE EFFECTIVENESS OF PROBLEM - BASED LEARNING MODEL LEARNING DEVICES”. IJER - INDONESIAN JOURNAL OF EDUCATIONAL REVIEW 7, no. 02 (November 2, 2020): 51-55. Accessed May 21, 2024. https://journal.unj.ac.id/unj/index.php/ijer/article/view/23249.