Mar Atus Solihah, F., & Bintaro, T. Y. (2023). IMPLEMENTATION OF A PROBLEM-BASED LEARNING MODEL USING POP-UP BOOKS TO INCREASE STUDENTS’ MOTIVATION AND ACHIEVEMENT IN NATURAL SCIENCE SUBJECTS. Proceeding Internasional Conference on Child Education, 1(1), 491–504. Retrieved from https://proceeding.unimar.ac.id/index.php/icce/article/view/51