Gaya APA

Goeldner, C, R., Ritchie, J, B. (2012). Tourism Principles, Practices, Philosophies (12th Ed.). Hoboken, NJ.: John Wiley and Sons, Inc..

Gaya MLA

Goeldner, Charles, R.., Ritchie, J.R., Brent. "Tourism Principles, Practices, Philosophies". 12th Ed. Hoboken, NJ.: John Wiley and Sons, Inc., 2012. BUKU.