“DEVELOPING FLASHCARD MEDIA FOR TEACHING VOCABULARY TO THE SEVENTH GRADE STUDENTS OF JUNIOR HIGH SCHOOL (Study Case in the Seventh Grade Students at SMPN 1 Sanankulon)”. 2018. Konstruktivisme : Jurnal Pendidikan Dan Pembelajaran 10 (2): 178-92. https://doi.org/10.35457/konstruk.v10i2.512.