APA (7th ed.) Citation

Sobell, M. G. (1986). Building applications using a 4GL (2nd ed.). Sobell Associates.

Chicago Style (17th ed.) Citation

Sobell, Mark G. Building Applications Using a 4GL. 2nd ed. Menlo Park, Calif: Sobell Associates, 1986.

MLA (9th ed.) Citation

Sobell, Mark G. Building Applications Using a 4GL. 2nd ed. Sobell Associates, 1986.