HAREFA, Meilinda Suriani. Meningkatkan Kualitas Manusia Dalam Praktek Lapangan Analisis Vegetasi dan Kemampuan E-Learning Melalui Problem Based Instruction (PBI). JURNAL GEOGRAFI, [S. l.], v. 4, n. 2, p. 37–56, 2012. DOI: 10.24114/jg.v4i2.8065. Disponível em: https://jurnal.unimed.ac.id/2012/index.php/geo/article/view/8065. Acesso em: 7 jun. 2025.