Cita APA (7th ed.)

Held, G. (1982). Apple II BASIC: Quick reference guide. Wiley.

Cita Chicago (17th ed.)

Held, Gilbert. Apple II BASIC: Quick Reference Guide. New York ; Chichester: Wiley, 1982.

Cita MLA (8th ed.)

Held, Gilbert. Apple II BASIC: Quick Reference Guide. Wiley, 1982.