Association for Educational Communications and Technology. (1989). Educational technology research and development: ETR & D. Association for Educational Communications and Technology.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रAssociation for Educational Communications and Technology. Educational Technology Research and Development: ETR & D. Washington, D.C: Association for Educational Communications and Technology, 1989.
एमएलए (9वां संस्करण) प्रशस्ति पत्रAssociation for Educational Communications and Technology. Educational Technology Research and Development: ETR & D. Association for Educational Communications and Technology, 1989.
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