Cita APA (7th ed.)

Black, D. A. (2015). Ruby programming: The well-grounded Rubyist (2nd ed.). Dreamtech.

Cita Chicago (17th ed.)

Black, David A. Ruby Programming: The Well-grounded Rubyist. 2nd ed. New Delhi: Dreamtech, 2015.

Cita MLA (9th ed.)

Black, David A. Ruby Programming: The Well-grounded Rubyist. 2nd ed. Dreamtech, 2015.