Silaban, A. L. I., and R. Refika. “USING FLYSWATTER GAME TO IMPROVE STUDENTS’ VOCABULARY MASTERY AT GRADE EIGTH SMP DWI SEJAHTERA PEKANBARU”. ELT-Lectura, Vol. 4, no. 2, Aug. 2017, doi:10.31849/elt-lectura.v4i2.488.