Contreras Jordán, R. M., Almache Granda, G. K. y Sandoval, M. J. (2021) «Use of WhatsApp to enhance grammar and vocabulary in university english foreign learners», Journal of Science and Research, 6(1), pp. 29–43. Disponible en: https://revistas.utb.edu.ec/index.php/sr/article/view/929 (Accedido: 29 marzo 2024).