Dyfyniad APA
(1980). Plain end steel tubes, welded and seamless: General tables of dimensions and masses per unit length.
Dyfyniad Arddull Chicago
Plain End Steel Tubes, Welded and Seamless: General Tables of Dimensions and Masses Per Unit Length. Genf, 1980.
Dyfyniad MLA
Plain End Steel Tubes, Welded and Seamless: General Tables of Dimensions and Masses Per Unit Length. 1980.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.