Cita APA (7a ed.)

Hartl, M. (2011). Ruby on rails 3 tutorial: Learn Rails by example (1st edition.). Addison-Wesley.

Cita Chicago Style (17a ed.)

Hartl, Michael. Ruby on Rails 3 Tutorial: Learn Rails by Example. 1st edition. Upper Saddle River, NJ: Addison-Wesley, 2011.

Cita MLA (9a ed.)

Hartl, Michael. Ruby on Rails 3 Tutorial: Learn Rails by Example. 1st edition. Addison-Wesley, 2011.