Zimmer, C. (2021). Life's edge: The search for what it means to be alive.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रZimmer, Carl. Life's Edge: The Search for What It Means to Be Alive. 2021.
एमएलए (8वां संस्करण) प्रशस्ति पत्रZimmer, Carl. Life's Edge: The Search for What It Means to Be Alive. 2021.
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