UBAYDULLAYEVA, D. . ENGLISH LANGUAGE SYSTEMS AND PROBLEMS IN TEACHING THEM. Евразийский журнал социальных наук, философии и культуры, [S. l.], v. 2, n. 11, p. 123–130, 2022. Disponível em: https://www.in-academy.uz/index.php/ejsspc/article/view/4695. Acesso em: 7 мар. 2026.