APA-viite (7. p.)

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

Chicago-viite (17. p.)

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

MLA-viite (9. p.)

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