APA (7th ed.) Citation

Olsen, R. (2008). Design patterns in Ruby. Addison-Wesley.

Chicago Style (17th ed.) Citation

Olsen, Russ. Design Patterns in Ruby. Upper Saddle River, N.J: Addison-Wesley, 2008.

MLA (9th ed.) Citation

Olsen, Russ. Design Patterns in Ruby. Addison-Wesley, 2008.

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