APA (7th ed.) Citation

Childe, G. (1942). What happened in history (Rev. ed.). Penguin.

Chicago Style (17th ed.) Citation

Childe, Gordon. What Happened in History. Rev. ed. Harmondsworth: Penguin, 1942.

MLA (9th ed.) Citation

Childe, Gordon. What Happened in History. Rev. ed. Penguin, 1942.