Cita APA

Symington, M., Ball, C., & Machiavelli, F. (2014). Portugal (Revised edition.). Dorling Kindersley Limited.

Citación estilo Chicago

Symington, Martin, Caroline Ball, and Francesca Machiavelli. Portugal. Revised edition. London: Dorling Kindersley Limited, 2014.

Cita MLA

Symington, Martin, et al. Portugal. Revised edition. Dorling Kindersley Limited, 2014.