Dyfyniad APA

B S I. (1971). UDC 67/673 Various industries trades and crafts precious metal and precious stones industries. Metal goods BS 1000 (67/673): 1971 and AMD 2741: 1971. B S I.

Dyfyniad Arddull Chicago

B S I. UDC 67/673 Various Industries Trades and Crafts Precious Metal and Precious Stones Industries. Metal Goods BS 1000 (67/673): 1971 and AMD 2741: 1971. London: B S I, 1971.

Dyfyniad MLA

B S I. UDC 67/673 Various Industries Trades and Crafts Precious Metal and Precious Stones Industries. Metal Goods BS 1000 (67/673): 1971 and AMD 2741: 1971. B S I, 1971.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.