APA Style
Microsoft MS-DOS Operating System version 5.0: User`s Guide and Reference. (1991).
United States of America:
Microsoft Corporation.
Chicago Style
Microsoft MS-DOS Operating System version 5.0: User`s Guide and Reference.
.
United States of America:
Microsoft Corporation,
1991.
Text.
MLA Style
Microsoft MS-DOS Operating System version 5.0: User`s Guide and Reference.
.
United States of America:
Microsoft Corporation,
1991.
Text.
Turabian Style
Microsoft MS-DOS Operating System version 5.0: User`s Guide and Reference.
United States of America:
Microsoft Corporation,
1991.
Print.