Cita APA

Toth, R. B., & Toth, R. B. (2000). Implementing a worldwide sustainable tourism certification system. [Alajuela, C.R.: [INCAE].

Citación estilo Chicago

Toth, Robert B., y Robert B. Toth. Implementing a Worldwide Sustainable Tourism Certification System. [Alajuela, C.R.: [INCAE], 2000.

Cita MLA

Toth, Robert B., y Robert B. Toth. Implementing a Worldwide Sustainable Tourism Certification System. [Alajuela, C.R.: [INCAE], 2000.