APA (7th ed.) Citation

UNESCO. (2009). The world's heritage: A complete guide to the most extraordinary places. HarperCollins Publishers, Ltd..

Chicago Style (17th ed.) Citation

UNESCO. The World's Heritage: A Complete Guide to the Most Extraordinary Places. London: HarperCollins Publishers, Ltd., 2009.

MLA (9th ed.) Citation

UNESCO. The World's Heritage: A Complete Guide to the Most Extraordinary Places. HarperCollins Publishers, Ltd., 2009.

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