APA (7e ed.) Bronvermelding

Childe, V. G., & Clark, G. (1942). What happened in history. Penguin books.

Chicago (17e ed.) Bronvermelding

Childe, V. Gordon, en Grahame Clark. What Happened in History. Baltimore: Penguin books, 1942.

MLA (8e ed.) Bronvermelding

Childe, V. Gordon, en Grahame Clark. What Happened in History. Penguin books, 1942.