Cita APA (7a ed.)

(1991). Commands & functions: Includes examples (1a. ed.). Fox Software.

Cita Chicago Style (17a ed.)

Commands & Functions: Includes Examples. 1a. ed. Ohio: Fox Software, 1991.

Cita MLA (8a ed.)

Commands & Functions: Includes Examples. 1a. ed. Fox Software, 1991.