(1988). IBM getting started with disk operating system version 4.00. Perfect Bound Pub.
Chicago Style (17th ed.) CitationIBM Getting Started with Disk Operating System Version 4.00. Quezon City: Perfect Bound Pub, 1988.
MLA (9th ed.) CitationIBM Getting Started with Disk Operating System Version 4.00. Perfect Bound Pub, 1988.
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