Supriyantoro D, Sumbawati MS, Sitompul NC. Pengembangan Perangkat Pembelajaran IPA dengan Model Problem Based Learning Berbasis Outdoor Learning. J. Pijar.MIPA [Internet]. 2019 Jul. 23 [cited 2024 Jun. 3];14(2):42-8. Available from: http://jurnalfkip.unram.ac.id/index.php/JPM/article/view/1136