Ellenberg, G. B. (2007). Mule South to tractor South: Mules, machines, and the transformation of the cotton South. University of Alabama Press.
Chicago-Zitierstil (17. Ausg.)Ellenberg, George B. Mule South to Tractor South: Mules, Machines, and the Transformation of the Cotton South. Tuscaloosa: University of Alabama Press, 2007.
MLA-Zitierstil (9. Ausg.)Ellenberg, George B. Mule South to Tractor South: Mules, Machines, and the Transformation of the Cotton South. University of Alabama Press, 2007.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.