Suparmi A, Paidi P. Development of problem-based learning materials on biodiversity using local potential of mangrove forests to enhance critical thinking skills of phase e students. JK [Internet]. 2025 Nov. 1 [cited 2025 Nov. 10];9(2):109-17. Available from: http://journal.uny.ac.id/index.php/jk/article/view/83620