APA (7th ed.) Citation

World Tourism Organization. (1979). Harmonizing the contents and presentation of information materials. The Organization.

Chicago Style (17th ed.) Citation

World Tourism Organization. Harmonizing the Contents and Presentation of Information Materials. Madrid: The Organization, 1979.

MLA (9th ed.) Citation

World Tourism Organization. Harmonizing the Contents and Presentation of Information Materials. The Organization, 1979.

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