Blaich, T. P., & Baumgartner, J. C. (1953). The challenge of democracy. McGraw-Hill.
Dyfyniad Arddull ChicagoBlaich, Theodore Paul, and Joseph Cornelius Baumgartner. The Challenge of Democracy. New York: McGraw-Hill, 1953.
Dyfyniad MLABlaich, Theodore Paul, and Joseph Cornelius Baumgartner. The Challenge of Democracy. McGraw-Hill, 1953.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.