Sari, V.P.E. and Mukhadis, A. 2017. The Effect of Problem Based Learning with Gallery Project and Locus of Control on Learning Achievement. Jurnal Pendidikan Teknologi dan Kejuruan. 23, 4 (Oct. 2017), 392–401. DOI:https://doi.org/10.21831/jptk.v23i4.14713.