Pandiangan, E., N. Sembiring, and J. J. Pangaribuan. “IMPROVING THE SEVENTH GRADE STUDENTS’ VOCABULARY MASTERY THROUGH WORD SEARCH PUZZLE AT SMP TRISAKTI 1 MEDAN”. Kairos English Language Teaching Journal, vol. 2, no. 1, June 2020, pp. 1-16, doi:10.54367/kairos.v2i1.721.