Greitens, E. (2012). The warrior's heart: Becoming a man of compassion and courage. Houghton Mifflin Harcourt.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGreitens, Eric. The Warrior's Heart: Becoming a Man of Compassion and Courage. Boston: Houghton Mifflin Harcourt, 2012.
एमएलए (8वां संस्करण) प्रशस्ति पत्रGreitens, Eric. The Warrior's Heart: Becoming a Man of Compassion and Courage. Houghton Mifflin Harcourt, 2012.
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