Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

Atkinson, William C. A History of Spain & Portugal. Harmondsworth: Penguin Books, 1965.

Cita MLA (9a ed.)

Atkinson, William C. A History of Spain & Portugal. Penguin Books, 1965.