APA (7e ed.) Bronvermelding

O'Leary, T. J., & Williams, B. K. (1992). Dbase iv: Release 1.1. McGraw-Hill.

Chicago (17e ed.) Bronvermelding

O'Leary, Timothy J., en Brian K. Williams. Dbase Iv: Release 1.1. New York: McGraw-Hill, 1992.

MLA (9e ed.) Bronvermelding

O'Leary, Timothy J., en Brian K. Williams. Dbase Iv: Release 1.1. McGraw-Hill, 1992.