APA (7th ed.) Citation

Hernon, Dugan, & Shuler. (2003). U.S. goverment on the web: Getting the information you need (3rd ed.). Libraries Unlimited.

Chicago Style (17th ed.) Citation

Hernon, Dugan, and Shuler. U.S. Goverment on the Web: Getting the Information You Need. 3rd ed. London: Libraries Unlimited, 2003.

MLA (8th ed.) Citation

Hernon, et al. U.S. Goverment on the Web: Getting the Information You Need. 3rd ed. Libraries Unlimited, 2003.