Microsoft Corporation. (1994). User's guide Microsoft MS-DOS 6.21 for the MS-DOS operating system. Microsoft.
芝加哥风格引文Microsoft Corporation. User's Guide Microsoft MS-DOS 6.21 for the MS-DOS Operating System. [Washington]: Microsoft, 1994.
MLA引文Microsoft Corporation. User's Guide Microsoft MS-DOS 6.21 for the MS-DOS Operating System. Microsoft, 1994.
警告：这些引文格式不一定是100％准确.