APA (7th ed.) Citation
Childe, V. G. (1942). What happened in history. Penguin Books.
Chicago Style (17th ed.) Citation
Childe, V. Gordon. What Happened in History. Harmondsworth, Middlesex, U.K.: Penguin Books, 1942.
MLA (9th ed.) Citation
Childe, V. Gordon. What Happened in History. Penguin Books, 1942.
Warning: These citations may not always be 100% accurate.