APA Style
Microsoft MS-DOS. 4.0 Operating System. (1986).
-:
Microsoft Corporation.
Chicago Style
Microsoft MS-DOS. 4.0 Operating System.
.
-:
Microsoft Corporation,
1986.
Text.
MLA Style
Microsoft MS-DOS. 4.0 Operating System.
.
-:
Microsoft Corporation,
1986.
Text.
Turabian Style
Microsoft MS-DOS. 4.0 Operating System.
-:
Microsoft Corporation,
1986.
Print.