Dyfyniad APA

British Standards Institution. (1967). Specification for ISO metric black hexagon bolts, screws and nuts metric units. British Standards Institution.

Dyfyniad Arddull Chicago

British Standards Institution. Specification for ISO Metric Black Hexagon Bolts, Screws and Nuts Metric Units. London: British Standards Institution, 1967.

Dyfyniad MLA

British Standards Institution. Specification for ISO Metric Black Hexagon Bolts, Screws and Nuts Metric Units. British Standards Institution, 1967.

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