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Siregar CAE, Siahaan S, Fukada H. The Effect Of Whatsapp Teaching Media To The Reading Comprehension On A Narrative Text At SMP Negeri 4 Pematangsiantar. Innovative [Internet]. 2024 Sep. 12 [cited 2026 May 16];4(5):2086-99. Available from: https://j-innovative.org/index.php/Innovative/article/view/15208