SUMANTI, Sumanti; EFFENDI, Z. Mawardi; RIDWAN, Ridwan; FESTIYED, Festiyed. Developing the Facebook-Problem Based Learning Model: A Way of Improving the Geographical Solving-Problem Skills at Senior High Schools. Sumatra Journal of Disaster, Geography and Geography Education, [S. l.], v. 3, n. 2, p. 57–61, 2019. DOI: 10.24036/sjdgge.v3i2.217. Disponível em: http://sjdgge.ppj.unp.ac.id/index.php/Sjdgge/article/view/217. Acesso em: 6 nov. 2026.