Freedman, R. (2007). Who was first?: Discovering the Americas. Clarion Books.
Cita Chicago Style (17a ed.)Freedman, Russell. Who Was First?: Discovering the Americas. New York: Clarion Books, 2007.
Cita MLA (8a ed.)Freedman, Russell. Who Was First?: Discovering the Americas. Clarion Books, 2007.
Precaución: Estas citas no son 100% exactas.