1.
Rahmi Y, Fitria Y. The Development of Math-Integrated Light and Optical Instruments Teaching Materials Using the Problem-Based Learning Model: For Students of Elementary School Teacher Study Program (PGSD). IJEDS [Internet]. 2019 Jun. 1 [cited 2026 Apr. 25];1(2):108-15. Available from: https://ijeds.ppj.unp.ac.id/index.php/IJEDS/article/view/101