APA (7th ed.) Citation

Carr, J. L. (1966). A history of Soviet Russia. Penguin Books.

Chicago Style (17th ed.) Citation

Carr, Jayne L. A History of Soviet Russia. Middlesex: Penguin Books, 1966.

MLA (9th ed.) Citation

Carr, Jayne L. A History of Soviet Russia. Penguin Books, 1966.