Pogorelova, Galina. ¬ęProficiency Level in English Teachers of the Seventh-Day Adventist Elementary Schools in the North Mexican Union Conference¬Ľ. anuario2020 1, no. 1 (noviembre 10, 2020): 5-8. Accedido febrero 28, 2024. http://anuarioinvestigacion.um.edu.mx/index.php/a2020/article/view/41.