HILLIER, KERRY R., T. F. MCLAUGHLIN, K. MARK DERBY, and SUSANNE SCARBOROUGH. 2014. “THE EFFECTS OF DIRECT INSTRUCTION FLASHCARDS AND A COLORRACETRACK TO SEE BASIC COLORS TO THREE PRESCHOOL STUDENTS: AFAILURE TO REPLICATE FOR TWO PARTICIPANTS”. International Journal of English and Education 3 (4): 387-98. https://ijee.org/ijee/article/view/1066.