APA-referens (7:e uppl.)

Hallgren, R. C. (1983). Interface projects for the APPLE II. National Book store.

Chicago-referens (17:e uppl.)

Hallgren, Richard C. Interface Projects for the APPLE II. Manila: National Book store, 1983.

MLA-referens (9:e uppl.)

Hallgren, Richard C. Interface Projects for the APPLE II. National Book store, 1983.