Ulrich, M. (2011). Running on empty: An ultramarathoner's story of love, loss, and a record-setting run across America. Avery.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रUlrich, Marshall. Running on Empty: An Ultramarathoner's Story of Love, Loss, and a Record-setting Run Across America. New York: Avery, 2011.
एमएलए (8वां संस्करण) प्रशस्ति पत्रUlrich, Marshall. Running on Empty: An Ultramarathoner's Story of Love, Loss, and a Record-setting Run Across America. Avery, 2011.
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