Dunn, W. N. (1981). Public policy analysis: An introduction. New Jersey: Prentice-Hall.
Dyfyniad Arddull ChicagoDunn, William N. Public Policy Analysis: An Introduction. New Jersey: Prentice-Hall, 1981.
Dyfyniad MLADunn, William N. Public Policy Analysis: An Introduction. New Jersey: Prentice-Hall, 1981.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.