Field, O. P. (1971). The effect of an unconstitutional statute. Da Capo Press.
Dyfyniad Arddull ChicagoField, Oliver Peter. The Effect of an Unconstitutional Statute. New York: Da Capo Press, 1971.
Dyfyniad MLAField, Oliver Peter. The Effect of an Unconstitutional Statute. Da Capo Press, 1971.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.