Robertson, D. (1985). A dictionary of modern politics. Europa.
Dyfyniad Arddull ChicagoRobertson, David. A Dictionary of Modern Politics. London: Europa, 1985.
Dyfyniad MLARobertson, David. A Dictionary of Modern Politics. Europa, 1985.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.