Dyfyniad APA

British Standards Institution. (1981). Specification for calorifiers and storage vessels for central heating and hot water supply. British Standards Institution.

Dyfyniad Arddull Chicago

British Standards Institution. Specification for Calorifiers and Storage Vessels for Central Heating and Hot Water Supply. London: British Standards Institution, 1981.

Dyfyniad MLA

British Standards Institution. Specification for Calorifiers and Storage Vessels for Central Heating and Hot Water Supply. British Standards Institution, 1981.

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