APA (7th ed.) Citation

Tapscott, D., & Williams, A. D. (2008). Wikinomics: How mass collaboration changes everything (Expanded ed.). Portfolio.

Chicago Style (17th ed.) Citation

Tapscott, Don, and Anthony D. Williams. Wikinomics: How Mass Collaboration Changes Everything. Expanded ed. New York: Portfolio, 2008.

MLA (9th ed.) Citation

Tapscott, Don, and Anthony D. Williams. Wikinomics: How Mass Collaboration Changes Everything. Expanded ed. Portfolio, 2008.