p-ISSN: 0852-2715 | e-ISSN: 2502-7220
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
Jl. Willem Iskandar Pasar. V Medan Estate.
Vol 20, No 77 (2014)
DOI: https://doi.org/10.24114/jpkm.v20i77