Gaya APA

Corporation, M. (1988). Microsoft MS-DOS version 3.3 : user's guide . Morristown, NJ: Morristown, NJ. : AT & T Information System.

Gaya MLA

Corporation, Microsoft. "Microsoft MS-DOS version 3.3 : user's guide". Morristown, NJ: Morristown, NJ. : AT & T Information System, 1988. Text.