Mar Atus Solihah, F. and 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), pp. 491–504. Available at: https://proceeding.unimar.ac.id/index.php/icce/article/view/51 (Accessed: 7 July 2025).