Παραπομπή APA
World Tourism Organization. (1999). The Future of National Tourism Offices, Praque, Czech Republic 27 may 1999: L'avenir des organisations nationales du tourisme, Praque, Republique tcheque, 27 mai 1999. Madrid: World Tourism Organization.
Παραπομπή Chicago StyleWorld Tourism Organization. The Future of National Tourism Offices, Praque, Czech Republic 27 May 1999: L'avenir Des Organisations Nationales Du Tourisme, Praque, Republique Tcheque, 27 Mai 1999. Madrid: World Tourism Organization, 1999.
Παραπομπή MLAWorld Tourism Organization. The Future of National Tourism Offices, Praque, Czech Republic 27 May 1999: L'avenir Des Organisations Nationales Du Tourisme, Praque, Republique Tcheque, 27 Mai 1999. Madrid: World Tourism Organization, 1999.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.