Crowley, D., & Heyer, P. (2007). Communication in history: Technology, culture, society (5th ed.). Pearson Allyn & Bacon.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCrowley, David, और Paul Heyer. Communication in History: Technology, Culture, Society. 5th ed. Boston: Pearson Allyn & Bacon, 2007.
एमएलए (9वां संस्करण) प्रशस्ति पत्रCrowley, David, और Paul Heyer. Communication in History: Technology, Culture, Society. 5th ed. Pearson Allyn & Bacon, 2007.
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