Elliot, O. (1975). Programmed learning aid for introduction to data processing. Learning Systems.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रElliot, Orville. Programmed Learning Aid for Introduction to Data Processing. Homewood, Ill: Learning Systems, 1975.
एमएलए (9वां संस्करण) प्रशस्ति पत्रElliot, Orville. Programmed Learning Aid for Introduction to Data Processing. Learning Systems, 1975.
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