APA (7th ed.) Citation

Google (Firm), Voices That Matter Conference, & Norton, K. (2007). Usability. Addison-Wesley.

Chicago Style (17th ed.) Citation

Google (Firm), Voices That Matter Conference, and Kelly Norton. Usability. [United States?]: Addison-Wesley, 2007.

MLA (9th ed.) Citation

Google (Firm), et al. Usability. Addison-Wesley, 2007.