HARIYATI; MUSTAJIB, A.; ARDIAN, E. 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), v. 2, n. 1, p. 27-33, 30 Nov. 2020.