[1]
Sumanti, S. et al. 2019. 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. 3, 2 (Dec. 2019), 57–61. DOI:https://doi.org/10.24036/sjdgge.v3i2.217.