Kelly, C. (1938). Outlaw trail: A history of Butch Cassidy and his wild bunch, Hole-in-the-Wall, Brown's Hole, Robber's Roost. The author.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रKelly, Charles. Outlaw Trail: A History of Butch Cassidy and His Wild Bunch, Hole-in-the-Wall, Brown's Hole, Robber's Roost. Salt Lake City: The author, 1938.
एमएलए (8वां संस्करण) प्रशस्ति पत्रKelly, Charles. Outlaw Trail: A History of Butch Cassidy and His Wild Bunch, Hole-in-the-Wall, Brown's Hole, Robber's Roost. The author, 1938.
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