Cita APA

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

Citación estilo Chicago

Childe, V. Gordon, and Grahame Clark. What Happened in History. Harmondsworth: Penguin Books, 1964.

Cita MLA

Childe, V. Gordon, and Grahame Clark. What Happened in History. Harmondsworth: Penguin Books, 1964.