Purnama, D. W. (2016) “VOCABULARY MASTERY BY USING FLASH CARD (An Experimental Study at Elementary Level Prima Putra English Course)”, Biormatika : Jurnal ilmiah fakultas keguruan dan ilmu pendidikan, 2(02). Available at: https://ejournal.unsub.ac.id/index.php/FKIP/article/view/164 (Accessed: 23 November 2024).