Harding, K. (1998). Going international English for tourism. New York: Oxford University press.
Chicago Style aipamenaHarding, Keith. Going International English for Tourism. New York: Oxford University press, 1998.
MLA aipamenaHarding, Keith. Going International English for Tourism. New York: Oxford University press, 1998.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.