MICROSOFT.. (1987). Microsoft MS-DOS user`s guide: Operating system version 3.3. Microsoft Corporation.
Lua i Stíl Chicago (17ú heag.)MICROSOFT.. Microsoft MS-DOS User`s Guide: Operating System Version 3.3. Taiwan: Microsoft Corporation, 1987.
Lua MLA (9ú heag.)MICROSOFT.. Microsoft MS-DOS User`s Guide: Operating System Version 3.3. Microsoft Corporation, 1987.
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