Dyfyniad APA

(1969). Specification for the use of structural steel in building. British Standards Institution.

Dyfyniad Arddull Chicago

Specification for the Use of Structural Steel in Building. London: British Standards Institution, 1969.

Dyfyniad MLA

Specification for the Use of Structural Steel in Building. British Standards Institution, 1969.

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