Hayes, J. M. (1941). Designs for social action. Paulist Press.
Dyfyniad Arddull ChicagoHayes, John M. Designs for Social Action. New York, N.Y.: Paulist Press, 1941.
Dyfyniad MLAHayes, John M. Designs for Social Action. Paulist Press, 1941.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.