Borisovna Kurilenko, Victoria, y Yulia Nickolaevna Biryukova. «ETHNIC AND CULTURAL CHALLENGES IN FOREIGN LANGUAGE EDUCATION: SPEECH ETIQUETTE». Revista Inclusiones (marzo 4, 2021): 378–383. Accedido enero 21, 2026. https://www.revistainclusiones.org/index.php/inclu/article/view/2547.