Keller, T. (2013). Walking with God through pain and suffering. Dutton, Penguin Group USA.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रKeller, Timothy. Walking with God Through Pain and Suffering. New York: Dutton, Penguin Group USA, 2013.
एमएलए (8वां संस्करण) प्रशस्ति पत्रKeller, Timothy. Walking with God Through Pain and Suffering. Dutton, Penguin Group USA, 2013.
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