Παραπομπή APA

World Tourism Organization. (2004). Information and documentation resource centres for tourism: Guidelines for Establishment and Maintenance. Madrid: World Tourism Organization.

Παραπομπή Chicago Style

World Tourism Organization. Information and Documentation Resource Centres for Tourism: Guidelines for Establishment and Maintenance. Madrid: World Tourism Organization, 2004.

Παραπομπή MLA

World Tourism Organization. Information and Documentation Resource Centres for Tourism: Guidelines for Establishment and Maintenance. Madrid: World Tourism Organization, 2004.

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