(2003). Dorling kindersley geography of the world. Dorling Kindersley.
Cita Chicago (17th ed.)Dorling Kindersley Geography of the World. London: Dorling Kindersley, 2003.
Cita MLA (9th ed.)Dorling Kindersley Geography of the World. Dorling Kindersley, 2003.
Atenció: Aquestes cites poden no estar 100% correctes.