Dyfyniad APA

Garrison C. Catherine. (1990). dBase IV: A Ready Reference Manual. New York, Addison-Wesley Publishing Company, 1990.

Dyfyniad Arddull Chicago

Garrison C. Catherine. DBase IV: A Ready Reference Manual. New York, Addison-Wesley Publishing Company, 1990, 1990.

Dyfyniad MLA

Garrison C. Catherine. DBase IV: A Ready Reference Manual. New York, Addison-Wesley Publishing Company, 1990, 1990.

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