BESTIANA, YUNIAR. “USING MODIFIED GAMEJEOPARDY! AND HOP-SCOTCH TO IMPROVE ENGLISH VOCABULARY MASTERY OF SEVENTH GRADERS IN SMP NEGERI 1 BONDOWOSO”. Retain: Journal of Research in English Language Teaching, vol. 2, no. 1, Feb. 2014, doi:10.26740/rt.v2i1.7061.