Penulis Arthur Johanes Pontoh Grace B. Nangoi Robert Lambey DOI: https://doi.org/10.32400/gc.12.2.18629.2017 Abstrak Unduhan PDF (English) Diterbitkan 2017-12-31 Terbitan Vol 12 No 2 (2017) Bagian Articles Lisensi Author keep the copyright of the article published in this journal