Παραπομπή APA

World Tourism Organization. (2002). Tourism: A catalyst for sustainable development in Africa, Abuja, Nigeria, 26 - 27 April 2002. Madrid, Spain: World Tourism Organization.

Παραπομπή Chicago Style

World Tourism Organization. Tourism: A Catalyst for Sustainable Development in Africa, Abuja, Nigeria, 26 - 27 April 2002. Madrid, Spain: World Tourism Organization, 2002.

Παραπομπή MLA

World Tourism Organization. Tourism: A Catalyst for Sustainable Development in Africa, Abuja, Nigeria, 26 - 27 April 2002. Madrid, Spain: World Tourism Organization, 2002.

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