(1971). British journal of political science. London: Cambridge University Press.
Dyfyniad Arddull ChicagoBritish Journal of Political Science. London: Cambridge University Press, 1971.
Dyfyniad MLABritish Journal of Political Science. London: Cambridge University Press, 1971.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.