APA-ийн эшлэл(7 дахь хэвлэлт)

Ferris, W. R., & Welty, E. (1992). Mule trader: Ray Lum's tales of horses, mules, and men. University Press of Mississippi.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Ferris, William R., ба Eudora Welty. Mule Trader: Ray Lum's Tales of Horses, Mules, and Men. Jackson, Mississippi: University Press of Mississippi, 1992.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Ferris, William R., ба Eudora Welty. Mule Trader: Ray Lum's Tales of Horses, Mules, and Men. University Press of Mississippi, 1992.