APA استشهاد

Goeldner, C. R. A., & Ritchie, J. R. B. A. (2009). Tourism: Principles, practices, philosophies (11th ed.).

استشهاد بنمط شيكاغو

Goeldner, Charles R; Author, و J R Brent; Author Ritchie. Tourism: Principles, Practices, Philosophies. 11th ed. New Jersey, John Wiley & Sons, Inc, 2009.

MLA استشهاد

Goeldner, Charles R; Author, و J R Brent; Author Ritchie. Tourism: Principles, Practices, Philosophies. 11th ed. 2009.