Cita APA (7a ed.)

Clark, O. (2014). Games as a service: How Free2Play design can make better games (1st edition.). Focal Press.

Cita Chicago Style (17a ed.)

Clark, Oscar. Games as a Service: How Free2Play Design Can Make Better Games. 1st edition. Burlington, Mass.: Focal Press, 2014.

Cita MLA (9a ed.)

Clark, Oscar. Games as a Service: How Free2Play Design Can Make Better Games. 1st edition. Focal Press, 2014.