ArchiveVolume 2, Issue 2, April 2016
Rudy Sofyan, Roswita Silalahi, Eddy Setia, Bahren Umar Siregar
Pages: 15-19     Published Online: Jul. 5, 2016
DOI: 10.11648/j.ijalt.20160202.11        Views 2539      Downloads 93
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