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Dyfyniad Arddull ChicagoSILBERSCHATZ ABRAHAM. DATABASE SYSTEM CONCEPTS 5TH ED. 4TH ED. BOSTON: MCGRAW-HILL, 2002.
Dyfyniad MLASILBERSCHATZ ABRAHAM. DATABASE SYSTEM CONCEPTS 5TH ED. 4TH ED. MCGRAW-HILL, 2002.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.