APA (7th ed.) Citation

Childe, V. G. (1964). What happened in history. Penguin Books.

Chicago Style (17th ed.) Citation

Childe, V. Gordon. What Happened in History. Harmondsworth, England: Penguin Books, 1964.

MLA (8th ed.) Citation

Childe, V. Gordon. What Happened in History. Penguin Books, 1964.

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