Cita APA (7a ed.)

McGavren, J. (2015). Head first Ruby (First edition.). O'Reilly.

Cita Chicago Style (17a ed.)

McGavren, Jay. Head First Ruby. First edition. Sebastopol, CA: O'Reilly, 2015.

Cita MLA (9a ed.)

McGavren, Jay. Head First Ruby. First edition. O'Reilly, 2015.