Krumm, R. (1985). Understanding and using dBase II and III. Simon and Schuster.
Cita Chicago (17th ed.)Krumm, Rob. Understanding and Using DBase II and III. New York: Simon and Schuster, 1985.
Cita MLA (9th ed.)Krumm, Rob. Understanding and Using DBase II and III. Simon and Schuster, 1985.
Atenció: Aquestes cites poden no estar 100% correctes.