Hanipah, Sri, Totok Sumaryanto Florentinus, and Achmad Rifai RC. “The Effectiveness of Problem Based Learning and Project Based Learning Model to Improve Natural Science Study Outcomes”. Innovative Journal of Curriculum and Educational Technology 7, no. 1 (July 31, 2018): 1-6. Accessed November 24, 2024. https://journal.unnes.ac.id/sju/ujet/article/view/24383.