Cita APA (7a ed.)

Olsen, R. (2011). Eloquent Ruby. Addison-Wesley.

Cita Chicago Style (17a ed.)

Olsen, Russ. Eloquent Ruby. Upper Saddle River, N.J.: Addison-Wesley, 2011.

Cita MLA (8a ed.)

Olsen, Russ. Eloquent Ruby. Addison-Wesley, 2011.