Graham, J. (1972). Systems analysis in business. Allen and Unwin.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGraham, John. Systems Analysis in Business. London: Allen and Unwin, 1972.
एमएलए (9वां संस्करण) प्रशस्ति पत्रGraham, John. Systems Analysis in Business. Allen and Unwin, 1972.
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