Hery Setiyawan, and Herfa Maulina Dewi Soewardini. “Integrating Puzzles and STAD Model in Teaching Angle Measurement to Elementary School Third Graders: An Action Research Study”. Education and Human Development Journal 8, no. 2 (September 30, 2023): 83–90. Accessed November 24, 2024. https://journal2.unusa.ac.id/index.php/EHDJ/article/view/5282.