Rahman AHB, Wasino W, Martitah M. Development of Social Studies Learning Module Based on Problem Based Learning with Outdoor Study to Improve Learning Outcomes of 7th Grade Junior High School Kesatrian 1 Students. JESS [Internet]. 23Sep.2018 [cited 19Apr.2024];7(2):132-9. Available from: https://journal.unnes.ac.id/sju/jess/article/view/25982