Παραπομπή APA

World Tourism Organization. (2001). Study on visa facilitation in the Silk Road countries. Madrid, Spain: World Tourism Organization.

Παραπομπή Chicago Style

World Tourism Organization. Study On Visa Facilitation in the Silk Road Countries. Madrid, Spain: World Tourism Organization, 2001.

Παραπομπή MLA

World Tourism Organization. Study On Visa Facilitation in the Silk Road Countries. Madrid, Spain: World Tourism Organization, 2001.

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