Munawaroh, B., & 		Masruri, M.
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 THE EFFECTIVENESS OF PROBLEM BASED LEARNING AND DISCOVERY LEARNING MODEL TOWARD LEARNING OUTCOME IN GEOGRAPHY ON STUDENTS WITH EXTERNAL LOCUS OF CONTROL.
<em>Geosfera Indonesia, 4</em>(1), 56-62.
doi:10.19184/geosi.v4i1.9240