APA (7th ed.) Citation

Corporation, I. B. M. (1987). Disk operating system. Version 3.30. User Guide. International Busines Machines.

Chicago Style (17th ed.) Citation

Corporation, International Busines Machines. Disk Operating System. Version 3.30. User Guide. International Busines Machines, 1987.

MLA (8th ed.) Citation

Corporation, International Busines Machines. Disk Operating System. Version 3.30. User Guide. International Busines Machines, 1987.

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