Childe, V. G. (1964). What happened in history. Penguin Books.
Cita Chicago Style (17a ed.)Childe, V. Gordon. What Happened in History. Harmondsworth, England: Penguin Books, 1964.
Cita MLA (8a ed.)Childe, V. Gordon. What Happened in History. Penguin Books, 1964.
Precaución: Estas citas no son 100% exactas.