Παραπομπή APA

World Tourism Organization., & European Tourism Trade Fairs Association. (1998). Travel & tourism fairs: Guidelines for exhibitors. Madrid: World Tourism Organization.

Παραπομπή Chicago Style

World Tourism Organization., and European Tourism Trade Fairs Association. Travel & Tourism Fairs: Guidelines for Exhibitors. Madrid: World Tourism Organization, 1998.

Παραπομπή MLA

World Tourism Organization., and European Tourism Trade Fairs Association. Travel & Tourism Fairs: Guidelines for Exhibitors. Madrid: World Tourism Organization, 1998.

Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.