Gennick, J., & Luers, T. (2000). Sams teach yourself PL/SQL in 21 days (2nd ed.). Techmedia..
Dyfyniad Arddull ChicagoGennick, Jonathan, and Tom Luers. Sams Teach Yourself PL/SQL in 21 Days. 2nd ed. Indianapolis, Ind. ; New Delhi: Techmedia., 2000.
Dyfyniad MLAGennick, Jonathan, and Tom Luers. Sams Teach Yourself PL/SQL in 21 Days. 2nd ed. Techmedia., 2000.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.