Davies, P. C. W. (2010). The eerie silence: Renewing our search for alien intelligence (1st U.S. ed.). Houghton Mifflin Harcourt.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रDavies, P. C. W. The Eerie Silence: Renewing Our Search for Alien Intelligence. 1st U.S. ed. Boston [Mass.]: Houghton Mifflin Harcourt, 2010.
एमएलए (8वां संस्करण) प्रशस्ति पत्रDavies, P. C. W. The Eerie Silence: Renewing Our Search for Alien Intelligence. 1st U.S. ed. Houghton Mifflin Harcourt, 2010.
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