Hasibuan AA, Rangkuti MNS. The Effect of the Problem Based Learning Model on Students’ Communication Skills and Learning Outcomes in Ecosystem Material. Biocaster j. kaji. bosbiol. [Internet]. 2026 Jul. 22 [cited 2026 Jul. 30];6(3):1651-60. Available from: https://e-journal.lp3kamandanu.com/index.php/biocaster/article/view/1176