Fitzgerald, M., Volckhausen, E., & Demarest, R. (2015). Ruby pocket reference (2nd ed.). O'Reilly.
Chicago Style (17th ed.) CitationFitzgerald, Michael, Ellie Volckhausen, and Rebecca Demarest. Ruby Pocket Reference. 2nd ed. Beijing, [China]: O'Reilly, 2015.
MLA (9th ed.) CitationFitzgerald, Michael, et al. Ruby Pocket Reference. 2nd ed. O'Reilly, 2015.
Warning: These citations may not always be 100% accurate.