Cita APA (7a ed.)
Roberts, J. (1973). Civilization: Volume II/Journey to the modern world. CRM books.
Cita Chicago Style (17a ed.)
Roberts, John. Civilization: Volume II/Journey to the Modern World. California: CRM books, 1973.
Cita MLA (9a ed.)
Roberts, John. Civilization: Volume II/Journey to the Modern World. CRM books, 1973.
Precaución: Estas citas no son 100% exactas.