APA (7th ed.) Citation

Marcotte, E., & Keith, J. (2011). Responsive web design. A Book Apart.

Chicago Style (17th ed.) Citation

Marcotte, Ethan, and Jeremy Keith. Responsive Web Design. New York: A Book Apart, 2011.

MLA (9th ed.) Citation

Marcotte, Ethan, and Jeremy Keith. Responsive Web Design. A Book Apart, 2011.