Cita APA (7a ed.)

Anderson, C. (2009). Free: The future of a radical price. Hyperion.

Cita Chicago Style (17a ed.)

Anderson, Chris. Free: The Future of a Radical Price. New York: Hyperion, 2009.

Cita MLA (8a ed.)

Anderson, Chris. Free: The Future of a Radical Price. Hyperion, 2009.