Microsoft Corporation. (1994). User's guide Microsoft MS-DOS 6.21 for the MS-DOS operating system. Microsoft.
Chicagoスタイル(17版)引用形式Microsoft Corporation. User's Guide Microsoft MS-DOS 6.21 for the MS-DOS Operating System. [Washington]: Microsoft, 1994.
MLA(9版)引用形式Microsoft Corporation. User's Guide Microsoft MS-DOS 6.21 for the MS-DOS Operating System. Microsoft, 1994.
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