Citazione Stile APA (7a Edizione)

(1988). IBM using disk operating system version 4.00. Perfect Bound.

Citazione stile Chigago Style (17a edizione)

IBM Using Disk Operating System Version 4.00. Quezon City: Perfect Bound, 1988.

Citatione MLA (9a ed.)

IBM Using Disk Operating System Version 4.00. Perfect Bound, 1988.