APA (7th ed.) Citation

Clark, G., & Clark, G. (1976). Prehistoric societies. Penguin Books.

Chicago Style (17th ed.) Citation

Clark, Grahame, and Grahame;Piggott Clark. Prehistoric Societies. Penguin Books, 1976.

MLA (9th ed.) Citation

Clark, Grahame, and Grahame;Piggott Clark. Prehistoric Societies. Penguin Books, 1976.

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