Abdurakhmonov Mirshod, Vokhidov Anvar, Pardayev Utkir, Musurmonov Tilovmurod, и Abdimurodov Doston. «CRITICAL PERIOD HYPOTHESIS TRUE FOR ESL LEARNERS». Journal of New Century Innovations, т. 28, вып. 4, май 2023 г., сс. 25-32, https://newjournal.org/new/article/view/6301.