Carrow, R. S. (1998). Soft logic a guide to using a PC as a programable logic controller (First edition.). McGraw-Hill.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCarrow, Robert S. Soft Logic a Guide to Using a PC as a Programable Logic Controller. First edition. New York: McGraw-Hill, 1998.
एमएलए (8वां संस्करण) प्रशस्ति पत्रCarrow, Robert S. Soft Logic a Guide to Using a PC as a Programable Logic Controller. First edition. McGraw-Hill, 1998.
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