Patterson, R. N. (2003). Balance of power. New York: Random House Audio.
Dyfyniad Arddull ChicagoPatterson, Richard North. Balance of Power. New York: Random House Audio, 2003.
Dyfyniad MLAPatterson, Richard North. Balance of Power. New York: Random House Audio, 2003.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.