Robertson, J. I. (1992). Civil war! america becomes one nation. Alferd A. Knopf.
Dyfyniad Arddull ChicagoRobertson, James I. Civil War! America Becomes One Nation. New York: Alferd A. Knopf, 1992.
Dyfyniad MLARobertson, James I. Civil War! America Becomes One Nation. Alferd A. Knopf, 1992.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.