APA (7th ed.) Citation

Shirky, C. (2010). Cognitive surplus: Creativity and generosity in a connected age. Penguin Press.

Chicago Style (17th ed.) Citation

Shirky, Clay. Cognitive Surplus: Creativity and Generosity in a Connected Age. New York: Penguin Press, 2010.

MLA (9th ed.) Citation

Shirky, Clay. Cognitive Surplus: Creativity and Generosity in a Connected Age. Penguin Press, 2010.

Warning: These citations may not always be 100% accurate.