Murdin, P. (2013). Are we being watched?: The search for life in the cosmos. Thames & Hudson.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रMurdin, Paul. Are We Being Watched?: The Search for Life in the Cosmos. New York: Thames & Hudson, 2013.
एमएलए (8वां संस्करण) प्रशस्ति पत्रMurdin, Paul. Are We Being Watched?: The Search for Life in the Cosmos. Thames & Hudson, 2013.
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