Alexander, E. (2012). Proof of heaven: A neurosurgeon's journey into the afterlife (First Simon & Schuster hardcover edition.). Simon & Schuster.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रAlexander, Eben. Proof of Heaven: A Neurosurgeon's Journey into the Afterlife. First Simon & Schuster hardcover edition. New York: Simon & Schuster, 2012.
एमएलए (8वां संस्करण) प्रशस्ति पत्रAlexander, Eben. Proof of Heaven: A Neurosurgeon's Journey into the Afterlife. First Simon & Schuster hardcover edition. Simon & Schuster, 2012.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.