Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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