Cita APA (7a ed.)

Carlson, L., & Richardson, L. (2006). Ruby cookbook. O'Reilly.

Cita Chicago Style (17a ed.)

Carlson, Lucas, y Leonard Richardson. Ruby Cookbook. Sebastopol, CA: O'Reilly, 2006.

Cita MLA (8a ed.)

Carlson, Lucas, y Leonard Richardson. Ruby Cookbook. O'Reilly, 2006.