Παραπομπή APA

World Tourism Organization. (2001). Tourism after 11 September 2001: Analysis, remedial actions and prospects (updated November 2001). Madrid, Spain: World Tourism Organization.

Παραπομπή Chicago Style

World Tourism Organization. Tourism After 11 September 2001: Analysis, Remedial Actions and Prospects (updated November 2001). Madrid, Spain: World Tourism Organization, 2001.

Παραπομπή MLA

World Tourism Organization. Tourism After 11 September 2001: Analysis, Remedial Actions and Prospects (updated November 2001). Madrid, Spain: World Tourism Organization, 2001.

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