Singh, L. (2008). Fundamental of tourism and travel. Isha Books.
Chicago Style aipamenaSingh, L.K. Fundamental of Tourism and Travel. Delhi: Isha Books, 2008.
MLA aipamenaSingh, L.K. Fundamental of Tourism and Travel. Isha Books, 2008.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.