Hariyati, Agus Mustajib, and Edi Ardian. “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, no. 1 (November 30, 2020): 27-33. Accessed May 6, 2021. https://ejournal.unisi.ac.id/index.php/shelves/article/view/1480.