APA-referens (7:e uppl.)

Atkinson, W. C. (1965). A history of Spain and Portugal. Penguin Books.

Chicago-referens (17:e uppl.)

Atkinson, William Christopher. A History of Spain and Portugal. [Middlesex, England]: Penguin Books, 1965.

MLA-referens (9:e uppl.)

Atkinson, William Christopher. A History of Spain and Portugal. Penguin Books, 1965.