Lahman, S. (2008). The pro football historical abstract: A hardcore fan's guide to all-time player rankings. Lyons Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रLahman, Sean. The Pro Football Historical Abstract: A Hardcore Fan's Guide to All-time Player Rankings. Guilford, Conn.: Lyons Press, 2008.
एमएलए (8वां संस्करण) प्रशस्ति पत्रLahman, Sean. The Pro Football Historical Abstract: A Hardcore Fan's Guide to All-time Player Rankings. Lyons Press, 2008.
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