Cita APA (7th ed.)

Stalker, P. (2007). A guide to countries of the world. Oxford University Press, Oxford.

Cita Chicago (17th ed.)

Stalker, Peter. A Guide to Countries of the World. New York: Oxford University Press, Oxford, 2007.

Cita MLA (9th ed.)

Stalker, Peter. A Guide to Countries of the World. Oxford University Press, Oxford, 2007.