APA Citation

Zenith Data Systems Corporation. (1985). MS-DOS, version 3. St. Joseph, Mich.: The Corporation.

Chicago Style Citation

Zenith Data Systems Corporation. MS-DOS, Version 3. St. Joseph, Mich.: The Corporation, 1985.

MLA Citation

Zenith Data Systems Corporation. MS-DOS, Version 3. St. Joseph, Mich.: The Corporation, 1985.

Warning: These citations may not always be 100% accurate.