APA (7th ed.) Citation

(2014). World's Best Cities: Celebrating 220 Great Destinations. National Geographic Society.

Chicago Style (17th ed.) Citation

World's Best Cities: Celebrating 220 Great Destinations. Washington, D.C.: National Geographic Society, 2014.

MLA (9th ed.) Citation

World's Best Cities: Celebrating 220 Great Destinations. National Geographic Society, 2014.

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