Hariyati, Mustajib, A., & Ardian, E. (2020). THE EFFECTIVENESS OF USING ENGLISH SONGS AS WARMING UP ACTIVITY TO ENHANCE STUDENTS’ MOTIVATION IN ENGLISH CLASSROOM AT THE EIGHTH GRADE OF SMPN I ENOK. J-Shelves of Indragiri (JSI), 2(1), 27–33. https://doi.org/10.32520/jsi.v2i1.1480