APA (7th ed.) Citation

APPLEBAUM. (2004). Gulag: A history of the soviet camps. Penguins Books.

Chicago Style (17th ed.) Citation

APPLEBAUM. Gulag: A History of the Soviet Camps. London: Penguins Books, 2004.

MLA (9th ed.) Citation

APPLEBAUM. Gulag: A History of the Soviet Camps. Penguins Books, 2004.

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