APA (7th ed.) Citation

(1991). World directory of documentation resources and systems for the travel and tourism sector. WTO.

Chicago Style (17th ed.) Citation

World Directory of Documentation Resources and Systems for the Travel and Tourism Sector. Madrid: WTO, 1991.

MLA (9th ed.) Citation

World Directory of Documentation Resources and Systems for the Travel and Tourism Sector. WTO, 1991.

Warning: These citations may not always be 100% accurate.