British Standards Institution. (1981). Specification for calorifiers and storage vessels for central heating and hot water supply. British Standards Institution.
Citação do estilo Chicago (17ª ed.)British Standards Institution. Specification for Calorifiers and Storage Vessels for Central Heating and Hot Water Supply. London: British Standards Institution, 1981.
Citação MLA (8ª ed.)British Standards Institution. Specification for Calorifiers and Storage Vessels for Central Heating and Hot Water Supply. British Standards Institution, 1981.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.