Friedrich, C. J. (1967). Introduction to Political theory: Twelve Lectures at Harvard. Jaico.
Dyfyniad Arddull ChicagoFriedrich, Carl J. Introduction to Political Theory: Twelve Lectures at Harvard. Bombay: Jaico, 1967.
Dyfyniad MLAFriedrich, Carl J. Introduction to Political Theory: Twelve Lectures at Harvard. Jaico, 1967.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.