Clark, F. J. (1972). Business systems and data processing procedures / F. J. Clark, Ronald Gale [and] Robert Gray. Prentice-Hall.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रClark, Frank James. Business Systems and Data Processing Procedures / F. J. Clark, Ronald Gale [and] Robert Gray. Englewood Cliffs, N. J: Prentice-Hall, 1972.
एमएलए (9वां संस्करण) प्रशस्ति पत्रClark, Frank James. Business Systems and Data Processing Procedures / F. J. Clark, Ronald Gale [and] Robert Gray. Prentice-Hall, 1972.
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