APA (7th ed.) Citation

Thomas, D., Fowler, C., & Hunt, A. (2005). Programming Ruby: The pragmatic programmers' guide (2nd ed.). Pragmatic Bookshelf.

Chicago Style (17th ed.) Citation

Thomas, David, Chad Fowler, and Andrew Hunt. Programming Ruby: The Pragmatic Programmers' Guide. 2nd ed. Raleigh, Carolina del Norte [etc.]: Pragmatic Bookshelf, 2005.

MLA (9th ed.) Citation

Thomas, David, et al. Programming Ruby: The Pragmatic Programmers' Guide. 2nd ed. Pragmatic Bookshelf, 2005.