Cita APA (7a ed.)

Robinson, M., & Picard, D. (2006). Tourism, culture and sustainable development. UNESCO.

Cita Chicago Style (17a ed.)

Robinson, Mike, y David Picard. Tourism, Culture and Sustainable Development. [Paris]: UNESCO, 2006.

Cita MLA (9a ed.)

Robinson, Mike, y David Picard. Tourism, Culture and Sustainable Development. UNESCO, 2006.