Cita APA (7a ed.)

Frick, T. (2010). Return on engagement: Content, strategy, and design techniques for digital marketing (1st edition.). Focal Press.

Cita Chicago Style (17a ed.)

Frick, Tim. Return on Engagement: Content, Strategy, and Design Techniques for Digital Marketing. 1st edition. Boston, Mass.: Focal Press, 2010.

Cita MLA (9a ed.)

Frick, Tim. Return on Engagement: Content, Strategy, and Design Techniques for Digital Marketing. 1st edition. Focal Press, 2010.