Willett, E. (1879). The gray scalp: Or, The Blackfoot brave. Beadle and Adams.
Lua i Stíl Chicago (17ú heag.)Willett, Edward. The Gray Scalp: Or, The Blackfoot Brave. New York: Beadle and Adams, 1879.
Lua MLA (8ú heag.)Willett, Edward. The Gray Scalp: Or, The Blackfoot Brave. Beadle and Adams, 1879.
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