For citations:
Khalilova G.G., Guseynova D.Sh., Mutalibov A.Sh. “Mastery of a Language” and Foreign Languages Teaching System. Dagestan State Pedagogical University. Journal. Psychological and Pedagogical Sciences. 2019;13(1):77-82. (In Russ.) https://doi.org/10.31161/1995-0659- 2019-13-1-77-82