Παραπομπή APA

World Tourism Organization. (1998). Quide for local authorities on developing sustainable tourism. Madrid, Spain: World Tourism Organization.

Παραπομπή Chicago Style

World Tourism Organization. Quide for Local Authorities On Developing Sustainable Tourism. Madrid, Spain: World Tourism Organization, 1998.

Παραπομπή MLA

World Tourism Organization. Quide for Local Authorities On Developing Sustainable Tourism. Madrid, Spain: World Tourism Organization, 1998.

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