Cita APA (7a ed.)

Thomas, D., Fowler, C., & Hunt, A. (2013). Programming Ruby 1.9 & 2.0: The pragmatic programmer's guide. Pragmatic Bookshelf.

Cita Chicago Style (17a ed.)

Thomas, Dave, Chad Fowler, y Andrew Hunt. Programming Ruby 1.9 & 2.0: The Pragmatic Programmer's Guide. Dallas: Pragmatic Bookshelf, 2013.

Cita MLA (9a ed.)

Thomas, Dave, et al. Programming Ruby 1.9 & 2.0: The Pragmatic Programmer's Guide. Pragmatic Bookshelf, 2013.