ArchiveVolume 8, Issue 6, November 2019
Iswan, Herwina, Teguh Ridka Fitrianto
Pages: 239-243     Published Online: Sep. 16, 2019
DOI: 10.11648/j.edu.20190806.11        Views 8      Downloads 11
Antonios Plageras
Pages: 244-248     Published Online: Sep. 19, 2019
DOI: 10.11648/j.edu.20190806.12        Views 4      Downloads 2
Xiulin Ma, Jingjing Liu, Jing Liang
Pages: 249-258     Published Online: Sep. 20, 2019
DOI: 10.11648/j.edu.20190806.13        Views 3      Downloads 5
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