Grinnell, G. B. (1913). Beyond the old frontier: Adventures of Indian-fighters, hunters, and fur-traders. C. Scribner's Sons.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGrinnell, George Bird. Beyond the Old Frontier: Adventures of Indian-fighters, Hunters, and Fur-traders. New York: C. Scribner's Sons, 1913.
एमएलए (8वां संस्करण) प्रशस्ति पत्रGrinnell, George Bird. Beyond the Old Frontier: Adventures of Indian-fighters, Hunters, and Fur-traders. C. Scribner's Sons, 1913.
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