Gaya APA

Goeldner, C, R., Ritchie, J, R, B. (2009). Tourism : Principles, Practices, Philosophies (Ed. 11). Canada: John Wiley Sons,Inc.

Gaya MLA

Goeldner, Charles, R.., Ritchie, J., R., Brent. "Tourism : Principles, Practices, Philosophies". Ed. 11 Canada: John Wiley Sons,Inc, 2009. Text.