NUZUL, AHMAD. “CONTEXTUAL TEACHING AND LEARNING EFECTIVITY FOR INCREASING ABILITY OF OPEN ECONOMIC UNDERSTANDING EFEKTIVITAS CONTEXTUAL TEACHING AND LEARNING DALAM MENINGKATKAN KEMAMPUAN MEMAHAMI PEREKONOMIAN TERBUKA”. Jurnal Pendidikan Ekonomi Dan Bisnis (JPEB), vol. 2, no. 2, Oct. 2014, pp. 27-39, doi:10.21009/JPEB.002.2.2.