Richard F Walters. (1987). Database Principles for Personal Computers. Prentice-Hall.
Dyfyniad Arddull ChicagoRichard F Walters. Database Principles for Personal Computers. Prentice-Hall, 1987.
Dyfyniad MLARichard F Walters. Database Principles for Personal Computers. Prentice-Hall, 1987.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.