APA (7th ed.) Citation

Olsen, R. (2007). Design Patterns in Ruby (1st edition.). Addison-Wesley Professional.

Chicago Style (17th ed.) Citation

Olsen, Russ. Design Patterns in Ruby. 1st edition. Addison-Wesley Professional, 2007.

MLA (9th ed.) Citation

Olsen, Russ. Design Patterns in Ruby. 1st edition. Addison-Wesley Professional, 2007.

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