Johnson, D. (2008). John Ringo, king of the cowboys: His life and times from the Hoo Doo War to Tombstone (2nd ed.). University of North Texas Press.
Citace podle Chicago (17th ed.)Johnson, David. John Ringo, King of the Cowboys: His Life and Times from the Hoo Doo War to Tombstone. 2nd ed. Denton, Tex.: University of North Texas Press, 2008.
Citace podle MLA (9th ed.)Johnson, David. John Ringo, King of the Cowboys: His Life and Times from the Hoo Doo War to Tombstone. 2nd ed. University of North Texas Press, 2008.
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