APA (7th ed.) Citation

Gruber, H. (1972). International communism in the era of Lenin: A documentary history. Anchor Books.

Chicago Style (17th ed.) Citation

Gruber, Helmut. International Communism in the Era of Lenin: A Documentary History. Garden City, N.Y.: Anchor Books, 1972.

MLA (8th ed.) Citation

Gruber, Helmut. International Communism in the Era of Lenin: A Documentary History. Anchor Books, 1972.