APA

Goeldner C. R., Ritchie J. R. B., . (2002). Tourism: principles, practices, philosophies. New York: WILEY.

Chicago

Goeldner Charles R, Ritchie J R Brent, . 2002. Tourism: principles, practices, philosophies. New York: WILEY.

Harvard

Goeldner C. R., Ritchie J. R. B., . (2002). Tourism: principles, practices, philosophies. New York: WILEY.

MLA

Goeldner Charles R, Ritchie J R Brent, . Tourism: principles, practices, philosophies. New York: WILEY. 2002.