Gaya APA

Ritchie, C, R, G, A, , J, R, B. (2012). TOURISM: Principles, Practices, Philosophies (Ed. 12). New Jersey: John Wiley & Sons, Inc..

Gaya MLA

Ritchie, Charles, R., Goeldner, And, , J., R., Brent. "TOURISM: Principles, Practices, Philosophies". Ed. 12 New Jersey: John Wiley & Sons, Inc., 2012. Text.