Ratnatunga, J., Roman, C., & Waldmann, E. (1993). Systems and procedures in accounting. John Wiley.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRatnatunga, Janek, Claudio Roman, और Erwin Waldmann. Systems and Procedures in Accounting. Brisbane: John Wiley, 1993.
एमएलए (9वां संस्करण) प्रशस्ति पत्रRatnatunga, Janek, et al. Systems and Procedures in Accounting. John Wiley, 1993.
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