APA (7th ed.) Citation

(1950). A history of the U.S.S.R. Penguin Books.

Chicago Style (17th ed.) Citation

A History of the U.S.S.R. Penguin Books, 1950.

MLA (8th ed.) Citation

A History of the U.S.S.R. Penguin Books, 1950.

Warning: These citations may not always be 100% accurate.