Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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