APA (7th ed.) Citation

Wharton, T., Till, T., & Wharton, G. (1998). Utah (Third edition.). Compass American Guides.

Chicago Style (17th ed.) Citation

Wharton, Tom, Tom Till, and Gayen Wharton. Utah. Third edition. Oakland: Compass American Guides, 1998.

MLA (9th ed.) Citation

Wharton, Tom, et al. Utah. Third edition. Compass American Guides, 1998.