Burton, J. (2009). The deadliest outlaws: The Ketchum gang and the Wild Bunch (2nd ed.). University of North Texas Press.
Lua i Stíl Chicago (17ú heag.)Burton, Jeffrey. The Deadliest Outlaws: The Ketchum Gang and the Wild Bunch. 2nd ed. Denton, Tex.: University of North Texas Press, 2009.
Lua MLA (9ú heag.)Burton, Jeffrey. The Deadliest Outlaws: The Ketchum Gang and the Wild Bunch. 2nd ed. University of North Texas Press, 2009.
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