Utami , Rina Aprilia. “Whatsapp Messenger As Mobile Learning Technique to the students’ Writing Skill in Caption at SMAN 4 Bangkalan ”. SELL (Scope of English Language Teaching, Linguistics, and Literature) Journal 4, no. 1 (January 28, 2020): 11–20. Accessed June 5, 2025. https://publikasi.stkippgri-bkl.ac.id/index.php/SL/article/view/212.