Ferris, W. R., & Welty, E. (1992). Mule trader: Ray Lum's tales of horses, mules, and men. University Press of Mississippi.
Lua i Stíl Chicago (17ú heag.)Ferris, William R., agus Eudora Welty. Mule Trader: Ray Lum's Tales of Horses, Mules, and Men. Jackson, Mississippi: University Press of Mississippi, 1992.
Lua MLA (9ú heag.)Ferris, William R., agus Eudora Welty. Mule Trader: Ray Lum's Tales of Horses, Mules, and Men. University Press of Mississippi, 1992.
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