Παραπομπή APA

World Tourism Organization. (2002). General quidelines for using data on international air-passenger traffic for tourism analysis. Madrid: World Tourism Organization.

Παραπομπή Chicago Style

World Tourism Organization. General Quidelines for Using Data On International Air-passenger Traffic for Tourism Analysis. Madrid: World Tourism Organization, 2002.

Παραπομπή MLA

World Tourism Organization. General Quidelines for Using Data On International Air-passenger Traffic for Tourism Analysis. Madrid: World Tourism Organization, 2002.

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