COMMERCIAL LAW PUB. (2003). INTELLECTUAL PROPERTY MANUAL. COMMERCIAL LAW PUBLISHERS.
Dyfyniad Arddull ChicagoCOMMERCIAL LAW PUB. INTELLECTUAL PROPERTY MANUAL. DELHI: COMMERCIAL LAW PUBLISHERS, 2003.
Dyfyniad MLACOMMERCIAL LAW PUB. INTELLECTUAL PROPERTY MANUAL. COMMERCIAL LAW PUBLISHERS, 2003.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.