Gregory, P. H. (2012). All-in-one CISA certified information systems auditor exam guide (2nd ed.). Tata McGraw-Hill.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGregory, Peter H. All-in-one CISA Certified Information Systems Auditor Exam Guide. 2nd ed. New York ; New Delhi: Tata McGraw-Hill, 2012.
एमएलए (8वां संस्करण) प्रशस्ति पत्रGregory, Peter H. All-in-one CISA Certified Information Systems Auditor Exam Guide. 2nd ed. Tata McGraw-Hill, 2012.
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