Vaughn, W. R. (1997). Hitchhiker's guide to Visual Basic and SQL server. Redmond: Microsoft Press, cop.
Dyfyniad Arddull ChicagoVaughn, William R. Hitchhiker's Guide to Visual Basic and SQL Server. Redmond: Microsoft Press, cop, 1997.
Dyfyniad MLAVaughn, William R. Hitchhiker's Guide to Visual Basic and SQL Server. Redmond: Microsoft Press, cop, 1997.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.