Journal of the Copyright Society of the USA (1988) Vol.36. University Law Centre.
Dyfyniad Arddull ChicagoJournal of the Copyright Society of the USA (1988) Vol.36. New York: University Law Centre.
Dyfyniad MLAJournal of the Copyright Society of the USA (1988) Vol.36. University Law Centre.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.