KURBANOVA NILUFAR NASRIDDINOVNA. THE PROBLEM OF STUDYING VARIATION IN MODERN ENGLISH . EPRA International Journal of Research and Development (IJRD), [S. l.], v. 8, n. 3, p. 22–26, 2023. Disponível em: http://eprajournals.net/index.php/IJRD/article/view/1612. Acesso em: 5 may. 2024.