Cita APA (7a ed.)

Ford, J. L. (2008). Ruby programming for the absolute beginner. Thomson Course Technology PTR.

Cita Chicago Style (17a ed.)

Ford, Jerry Lee. Ruby Programming for the Absolute Beginner. Boston: Thomson Course Technology PTR, 2008.

Cita MLA (9a ed.)

Ford, Jerry Lee. Ruby Programming for the Absolute Beginner. Thomson Course Technology PTR, 2008.