Cita APA (7a ed.)

Perrotta, P., & Beighley, L. (2014). Metaprogramming Ruby 2: Program like the Ruby pros (2nd ed.). The Pragmatic Bookshelf.

Cita Chicago Style (17a ed.)

Perrotta, Paolo, y Lynn Beighley. Metaprogramming Ruby 2: Program like the Ruby Pros. 2nd ed. Dallas, Texas ; Raleigh, North Carolina: The Pragmatic Bookshelf, 2014.

Cita MLA (9a ed.)

Perrotta, Paolo, y Lynn Beighley. Metaprogramming Ruby 2: Program like the Ruby Pros. 2nd ed. The Pragmatic Bookshelf, 2014.