APA (7th ed.) Citation

MICROSOFT.. (1987). Microsoft MS-DOS user`s guide: Operating system version 3.3. Microsoft Corporation.

Chicago Style (17th ed.) Citation

MICROSOFT.. Microsoft MS-DOS User`s Guide: Operating System Version 3.3. Taiwan: Microsoft Corporation, 1987.

MLA (9th ed.) Citation

MICROSOFT.. Microsoft MS-DOS User`s Guide: Operating System Version 3.3. Microsoft Corporation, 1987.