Toth, R. B. (2000). Implementing a worldwide sustainable tourism certification system. [S.l.]: INCAE.
Citación estilo ChicagoToth, Robert B. Implementing a Worldwide Sustainable Tourism Certification System. [S.l.]: INCAE, 2000.
Cita MLAToth, Robert B. Implementing a Worldwide Sustainable Tourism Certification System. [S.l.]: INCAE, 2000.
Precaución: Estas citas no son 100% exactas.