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Hidayati, R.N. and Machmuda, A.N. 2022. The Effectiveness of Using Whatsapp Group to Improve Grammar Ability in Report Text of the Tenth Grade Students at SMA N 1 Prambanan in the Academic Year of 2019/2020. Journal of English Language Teaching and English Linguistics. 7, 1 (Jan. 2022). DOI:https://doi.org/10.31316/eltics.v7i1.2221.