Vol. 20 No. 1 (2016)
Published:
2017-03-26
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https://doi.org/10.24252/jumdpi.v20i1.2311 Views: 8913 / PDF Downloads: 17239
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https://doi.org/10.24252/jumdpi.v20i1.2312 Views: 739 / PDF Downloads: 733
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https://doi.org/10.24252/jumdpi.v20i1.2313 Views: 299 / PDF Downloads: 293