Santika N. The Application of Audio Recording in a Smartphone to Assist Students’ Speaking Skills in Senior High School. RETAIN : J. Res. Engl. Lang. Teach. [Internet]. 2021 Jul. 26 [cited 2025 Jul. 1];9(2):102-11. Available from: https://ejournal.unesa.ac.id/index.php/retain/article/view/40241