Mojarradi, Saeed. “The Effect of Using Flashcards on ESL (English As a Second Language) students’ Ability to Learn Vocabulary”. International Journal of Scientific World 2, no. 2 (September 5, 2014): 56–61. Accessed May 17, 2025. https://mail.sciencepubco.com/index.php/IJSW/article/view/3291.