(1957). The writer's resource book. Chicago: Scott, Foresman.
Dyfyniad Arddull ChicagoThe Writer's Resource Book. Chicago: Scott, Foresman, 1957.
Dyfyniad MLAThe Writer's Resource Book. Chicago: Scott, Foresman, 1957.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.