Penulis Brigita R. Umbas Grace B. Nangoi Victorina Tirayoh DOI: https://doi.org/10.32400/gc.13.04.21976.2018 Abstrak Unduhan PDF (English) Diterbitkan 2018-12-31 Terbitan Vol 13 No 04 (2018) Bagian Articles Lisensi Author keep the copyright of the article published in this journal