Roberts, J. M. (1995). A concise history of the world. Oxford University Press.
Dyfyniad Arddull ChicagoRoberts, John Morris. A Concise History of the World. New York: Oxford University Press, 1995.
Dyfyniad MLARoberts, John Morris. A Concise History of the World. Oxford University Press, 1995.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.