Cita APA (7th ed.)
Baird, K. Ruby by Example. No Starch Press, Incorporated.
Cita Chicago (17th ed.)
Baird, Kevin. Ruby by Example. US: No Starch Press, Incorporated.
Cita MLA (9th ed.)
Baird, Kevin. Ruby by Example. No Starch Press, Incorporated.
Atenció: Aquestes cites poden no estar 100% correctes.