COMMON EUROPEAN FRAMEWORK OF REFERENCE (CEFR). (2023). "XXI ASRDA INNOVATSION TEXNOLOGIYALAR, FAN VA TAŹ¼LIM TARAQQIYOTIDAGI DOLZARB MUAMMOLAR" Nomli Respublika Ilmiy-Amaliy Konferensiyasi, 1(4), 161-166. https://universalpublishings.com/index.php/itfttdm/article/view/1028