Published: 01-07-2019

DOI: https://doi.org/10.34012/jukep.v2i2.540
DOI: https://doi.org/10.34012/jukep.v2i2.548
DOI: https://doi.org/10.34012/jukep.v2i2.537
DOI: https://doi.org/10.34012/jukep.v2i2.567
DOI: https://doi.org/10.34012/jukep.v2i2.539
DOI: https://doi.org/10.34012/jukep.v2i2.556
DOI: https://doi.org/10.34012/jukep.v2i2.541
DOI: https://doi.org/10.34012/jukep.v2i2.542
DOI: https://doi.org/10.34012/jukep.v2i2.538
DOI: https://doi.org/10.34012/jukep.v2i2.568
DOI: https://doi.org/10.34012/jukep.v2i2.573
DOI: https://doi.org/10.34012/jukep.v2i2.570