Stone, D. A. (1997). Policy paradox: The art of political decision making. W.W. Norton.
Dyfyniad Arddull ChicagoStone, Deborah A. Policy Paradox: The Art of Political Decision Making. New York: W.W. Norton, 1997.
Dyfyniad MLAStone, Deborah A. Policy Paradox: The Art of Political Decision Making. W.W. Norton, 1997.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.