APA (7th ed.) Citation

Boulton. (1997). Lisbon: Eyewitness travel guides. Dorling Kindersley.

Chicago Style (17th ed.) Citation

Boulton. Lisbon: Eyewitness Travel Guides. London: Dorling Kindersley, 1997.

MLA (9th ed.) Citation

Boulton. Lisbon: Eyewitness Travel Guides. Dorling Kindersley, 1997.

Warning: These citations may not always be 100% accurate.