Cita APA

Childe, V. G. 1., & Clark, G. 1. (1954). What happened in history (Revised edition.). Middlesex, England: Penguin Books.

Citación estilo Chicago

Childe, Vere Gordon 1892-1957, y Grahame 1907-1995 Clark. What Happened in History. Revised edition. Middlesex, England: Penguin Books, 1954.

Cita MLA

Childe, Vere Gordon 1892-1957, y Grahame 1907-1995 Clark. What Happened in History. Revised edition. Middlesex, England: Penguin Books, 1954.