Wulandari, E. M., and Muammar Chadafi. “The Effectiveness of Using Flashcards on Teaching English Vocabulary ”. JEET, Journal of English Education and Technology, Vol. 2, no. 04, Jan. 2022, pp. 522 -31, http://jeet.fkdp.or.id/index.php/jeet/article/view/58.