Practical Ruby Gems

MLA

Berube, David, and Yan Pritzker. Practical Ruby Gems. Apress, 2007.

APA

Berube, D., & Pritzker, Y. (2007). Practical Ruby Gems. Apress.

Chicago

Berube, David, and Yan Pritzker. Practical Ruby Gems. : Apress, 2007.