J., E. Хялбар англи хэл, англи хэлний үйл үгийн цаг: Easy English “English verb tenses”. Mongolian Journal of Foreign Languages and Cultures, [S. l.], v. 18, n. 410, p. 95–99, 2023. DOI: 10.22353/MJFLC2014113. Disponível em: https://journal.num.edu.mn/JOFLAC/article/view/4267. Acesso em: 11 jan. 2025.