Dyfyniad APA

Feldt, R., Johnson, L., & Neumann, M. (2002). Ruby developer's guide. Syngress Pub..

Dyfyniad Arddull Chicago

Feldt, Robert, Lyle Johnson, and Michael Neumann. Ruby Developer's Guide. Rockland, MA: Syngress Pub., 2002.

Dyfyniad MLA

Feldt, Robert, et al. Ruby Developer's Guide. Syngress Pub., 2002.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.