Sari, N. H. Y. and Masruri, M. S. (2018) “THE EFFECTIVENESS OF PROJECT-BASED LEARNING AND PROBLEM- BASED LEARNING MODELS TOWARDS GEOGRAPHY LEARNING OUTCOMES IN TERMS OF STUDENTS’ LOCUS OF CONTROL”, Geosfera Indonesia, 3(3), pp. 16–25. doi: 10.19184/geosi.v3i3.8790.