Sabine, G. H., & Thorson, T. L. (1973). A history of political theory (4th ed.). Dryden Press, Oxford & IBH Publishing.
Dyfyniad Arddull ChicagoSabine, George Holland, and Thomas Landon Thorson. A History of Political Theory. 4th ed. Hinsdale, Ill. : New Delhi: Dryden Press, Oxford & IBH Publishing, 1973.
Dyfyniad MLASabine, George Holland, and Thomas Landon Thorson. A History of Political Theory. 4th ed. Dryden Press, Oxford & IBH Publishing, 1973.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.