APA (7th ed.) Citation

Perrotta, P. (2010). Metaprogramming Ruby: Program like the Ruby pros. Pragmatic Bookshelf.

Chicago Style (17th ed.) Citation

Perrotta, Paolo. Metaprogramming Ruby: Program like the Ruby Pros. Raleigh, N.C.: Pragmatic Bookshelf, 2010.

MLA (9th ed.) Citation

Perrotta, Paolo. Metaprogramming Ruby: Program like the Ruby Pros. Pragmatic Bookshelf, 2010.

Warning: These citations may not always be 100% accurate.