Barraclough, G. (1955). History in a changing world. University of Oklahoma Press.
Chicago-Zitierstil (17. Ausg.)Barraclough, Geoffrey. History in a Changing World. Norman: University of Oklahoma Press, 1955.
MLA-Zitierstil (8. Ausg.)Barraclough, Geoffrey. History in a Changing World. University of Oklahoma Press, 1955.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.