Gardner, R., & Shortelle, D. (1997). From talking drums to the Internet: An encyclopedia of communications technology. ABC-CLIO.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGardner, Robert, और Dennis Shortelle. From Talking Drums to the Internet: An Encyclopedia of Communications Technology. Santa Barbara, Calif: ABC-CLIO, 1997.
एमएलए (9वां संस्करण) प्रशस्ति पत्रGardner, Robert, और Dennis Shortelle. From Talking Drums to the Internet: An Encyclopedia of Communications Technology. ABC-CLIO, 1997.
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