APA (7th ed.) Citation

St. Louis, R., Davies, S., & Symington, A. (2014). Barcelona (9th edition.). Lonely Planet.

Chicago Style (17th ed.) Citation

St. Louis, Regis, Sally Davies, and Andy Symington. Barcelona. 9th edition. Footscray, Victoria: Lonely Planet, 2014.

MLA (9th ed.) Citation

St. Louis, Regis, et al. Barcelona. 9th edition. Lonely Planet, 2014.

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