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.