SUPRIYANTORO, D.; SUMBAWATI, M. S.; SITOMPUL, N. C. Pengembangan Perangkat Pembelajaran IPA dengan Model Problem Based Learning Berbasis Outdoor Learning. Jurnal Pijar Mipa, [S. l.], v. 14, n. 2, p. 42–48, 2019. DOI: 10.29303/jpm.v14i2.1136. Disponível em: https://jurnalfkip.unram.ac.id/index.php/JPM/article/view/1136. Acesso em: 30 jan. 2023.