Παραπομπή APA

Khavronina, S. Russian as we Speak (4th ed.). Progress Pubishers.

Παραπομπή Chicago Style

Khavronina, S.A. Russian as We Speak. 4th ed. Moscow: Progress Pubishers.

Παραπομπή MLA

Khavronina, S.A. Russian as We Speak. 4th ed. Progress Pubishers.