Iranto, Dicky, and S Suparno. 2014. “THE EFFECTS OF PBL METHOD USING THE HYPERMEDIA TO THE STUDENTS’ CRITICAL THINKING SKILL ON THE SOCIAL STUDIES SUBJECT”. Jurnal Pendidikan Ekonomi Dan Bisnis (JPEB) 2 (2):40-52. https://doi.org/10.21009/JPEB.002.2.3.