APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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