International Business Machines Corporation. International Technical Support Organization, ProQuest (Firm), & Rodriguez, A. (2002). Security (4th ed.). IBM corporation.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रInternational Business Machines Corporation. International Technical Support Organization, ProQuest (Firm), और Adolfo Rodriguez. Security. 4th ed. Research Triangle Park, NC: IBM corporation, 2002.
एमएलए (8वां संस्करण) प्रशस्ति पत्रInternational Business Machines Corporation. International Technical Support Organization, et al. Security. 4th ed. IBM corporation, 2002.
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