Singh, S. (1999). studies in tourism: Key issues for effective management. A P H.
Chicago Style aipamenaSingh, Sagar. Studies in Tourism: Key Issues for Effective Management. New Delhi: A P H, 1999.
MLA aipamenaSingh, Sagar. Studies in Tourism: Key Issues for Effective Management. A P H, 1999.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.