APA (7th ed.) Citation

Thomas, D. (2007). Programming Ruby: The pragmatic programmer's guide ; [includes Ruby 1.8] (2. ed., 11. pr.). Pragmatic Bookshelf.

Chicago Style (17th ed.) Citation

Thomas, David. Programming Ruby: The Pragmatic Programmer's Guide ; [includes Ruby 1.8]. 2. ed., 11. pr. Raleigh, NC [u.a.]: Pragmatic Bookshelf, 2007.

MLA (9th ed.) Citation

Thomas, David. Programming Ruby: The Pragmatic Programmer's Guide ; [includes Ruby 1.8]. 2. ed., 11. pr. Pragmatic Bookshelf, 2007.