Dyfyniad APA

American Foundrymen's Society. (1989). Refractories manual. American Foundrymen.

Dyfyniad Arddull Chicago

American Foundrymen's Society. Refractories Manual. Des Plaines: American Foundrymen, 1989.

Dyfyniad MLA

American Foundrymen's Society. Refractories Manual. American Foundrymen, 1989.

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