Cita APA (7th ed.)

Campbell, M. (1989). Mary Campbell's dBASE IV handbook. Bantam Books.

Cita Chicago (17th ed.)

Campbell, Mary. Mary Campbell's DBASE IV Handbook. Toronto: Bantam Books, 1989.

Cita MLA (9th ed.)

Campbell, Mary. Mary Campbell's DBASE IV Handbook. Bantam Books, 1989.