Doswell, R. (1978). Case studies in tourism: The International Federation for Productive Tourism. Barrie & Jenkins.
Chicago Style aipamenaDoswell, Roger. Case Studies in Tourism: The International Federation for Productive Tourism. London: Barrie & Jenkins, 1978.
MLA aipamenaDoswell, Roger. Case Studies in Tourism: The International Federation for Productive Tourism. Barrie & Jenkins, 1978.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.