Penulis Maria Debora Makalew Grace B. Nangoi Robert Lambey DOI: https://doi.org/10.32400/gc.13.02.19083.2018 Abstrak Unduhan PDF (English) Diterbitkan 2018-04-19 Terbitan Vol 13 No 02 (2018) Bagian Articles Lisensi Author keep the copyright of the article published in this journal