Ahmad, M., & Sukariman, S. (2018). The Influence of English Teacher Certification and Non-Certification towards the Students’ Understanding on English Grammar at SMAN 4 Halmahera Barat and at SMAN 3 Kota Ternate. Langua: Journal of Linguistics, Literature, and Language Education, 1(1), 83-97. https://doi.org/10.5281/zenodo.1443469