APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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