Cita APA (7a ed.)

Bartle, R. A. (2004). Designing virtual worlds. New Riders.

Cita Chicago Style (17a ed.)

Bartle, Richard A. Designing Virtual Worlds. Indianapolis, Ind.: New Riders, 2004.

Cita MLA (9a ed.)

Bartle, Richard A. Designing Virtual Worlds. New Riders, 2004.