Patterson Thomas E. (2003). The American Democracy. American: McGraw-Hill.
Dyfyniad Arddull ChicagoPatterson Thomas E. The American Democracy. American: McGraw-Hill, 2003.
Dyfyniad MLAPatterson Thomas E. The American Democracy. American: McGraw-Hill, 2003.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.