APA (7th ed.) Citation

Lehman, J. A. (1991). Systems design in the fourth generation: Object-based development using dBASE. John Wiley.

Chicago Style (17th ed.) Citation

Lehman, John A. Systems Design in the Fourth Generation: Object-based Development Using DBASE. New York, N.Y.: John Wiley, 1991.

MLA (9th ed.) Citation

Lehman, John A. Systems Design in the Fourth Generation: Object-based Development Using DBASE. John Wiley, 1991.