APA aipamena

Walker, R., & Harding, K. (2006). Tourism: Student's book. United Kingdom: Oxford University Press.

Chicago Style aipamena

Walker, Robin, và Keith Harding. Tourism: Student's Book. United Kingdom: Oxford University Press, 2006.

MLA aipamena

Walker, Robin, và Keith Harding. Tourism: Student's Book. United Kingdom: Oxford University Press, 2006.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.