Stone, H. W. (1976). Crisis counseling. Fortress Press.
Dyfyniad Arddull ChicagoStone, Howard W. Crisis Counseling. Philadelphia: Fortress Press, 1976.
Dyfyniad MLAStone, Howard W. Crisis Counseling. Fortress Press, 1976.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.