APA
(1987). Turbo Basic Owner's Handbook. Scotts Valley, USA: Borland international Inc.
Chicago
1987. Turbo Basic Owner's Handbook. Scotts Valley, USA: Borland international Inc.
Harvard
(1987). Turbo Basic Owner's Handbook. Scotts Valley, USA: Borland international Inc.
MLA
Turbo Basic Owner's Handbook. Scotts Valley, USA: Borland international Inc. 1987.
