Palmer, P. J. (2018). On the brink of everything: Grace, gravity, and getting old (First edition.). Berrett-Koehler Publishers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPalmer, Parker J. On the Brink of Everything: Grace, Gravity, and Getting Old. First edition. Oakland, CA: Berrett-Koehler Publishers, 2018.
एमएलए (8वां संस्करण) प्रशस्ति पत्रPalmer, Parker J. On the Brink of Everything: Grace, Gravity, and Getting Old. First edition. Berrett-Koehler Publishers, 2018.
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