APA Style
Disk Operating Systems Version 3.30. (1987).
Florida:
International Business Machines Corp..
Chicago Style
Disk Operating Systems Version 3.30.
.
Florida:
International Business Machines Corp.,
1987.
Text.
MLA Style
Disk Operating Systems Version 3.30.
.
Florida:
International Business Machines Corp.,
1987.
Text.
Turabian Style
Disk Operating Systems Version 3.30.
Florida:
International Business Machines Corp.,
1987.
Print.