Bulletin of Copyright Society of the USA (1978-79) Vol.26. University Law Centre.
Dyfyniad Arddull ChicagoBulletin of Copyright Society of the USA (1978-79) Vol.26. New York: University Law Centre.
Dyfyniad MLABulletin of Copyright Society of the USA (1978-79) Vol.26. University Law Centre.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.