APA (7th ed.) Citation
Feldt, R., Johnson, L., & Neumann, M. (2002). Ruby developer's guide. Syngress Pub..
Chicago Style (17th ed.) Citation
Feldt, Robert, Lyle Johnson, and Michael Neumann. Ruby Developer's Guide. Rockland, MA: Syngress Pub., 2002.
MLA (9th ed.) Citation
Feldt, Robert, et al. Ruby Developer's Guide. Syngress Pub., 2002.
Warning: These citations may not always be 100% accurate.