APA (7th ed.) Zitazioa

POTAPOVA, M. Fifty lessons in Russian. Progress Publishers.

Chicago Style (17th ed.) Zitazioa

POTAPOVA, Mina. Fifty Lessons in Russian. Moscow: Progress Publishers.

MLA (9th ed.) Zitazioa

POTAPOVA, Mina. Fifty Lessons in Russian. Progress Publishers.