Dyfyniad APA

Roberts, G. A., & Cary, R. A. (1980). Tool steels. American society for metals.

Dyfyniad Arddull Chicago

Roberts, George A., and Robert A. Cary. Tool Steels. Ohio: American society for metals, 1980.

Dyfyniad MLA

Roberts, George A., and Robert A. Cary. Tool Steels. American society for metals, 1980.

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