APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Childe, Gordon. What Happened in History. Middlesex: Penguin Books, 1942.

MLA (9th ed.) Citation

Childe, Gordon. What Happened in History. Penguin Books, 1942.

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