Dyfyniad APA

Cook, R. A., Yale, L. J., & Marqua, J. J. (2012). Tourism: The business of travel (3rd ed.). Pearson.

Dyfyniad Arddull Chicago

Cook, Roy A., Laura J. Yale, and Joseph J. Marqua. Tourism: The Business of Travel. 3rd ed. New Delhi: Pearson, 2012.

Dyfyniad MLA

Cook, Roy A., et al. Tourism: The Business of Travel. 3rd ed. Pearson, 2012.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.