Cita APA (7th ed.)
Cowart, R. (1989). The ABC's of dBase IV. BPB.
Cita Chicago (17th ed.)
Cowart, Robert. The ABC's of DBase IV. New Delhi: BPB, 1989.
Cita MLA (9th ed.)
Cowart, Robert. The ABC's of DBase IV. BPB, 1989.
Atenció: Aquestes cites poden no estar 100% correctes.