APA (7th ed.) Citation

Gombin, R. (1975). The origins of modern leftism. Penguin.

Chicago Style (17th ed.) Citation

Gombin, Richard. The Origins of Modern Leftism. Harmondsworth ; Baltimore [etc.]: Penguin, 1975.

MLA (8th ed.) Citation

Gombin, Richard. The Origins of Modern Leftism. Penguin, 1975.