Não informado. (1985). Building Services. Chartered Institution of Building Services Engineers.
Citação do estilo Chicago (17ª ed.)Não informado. Building Services. London: Chartered Institution of Building Services Engineers, 1985.
Citação MLA (8ª ed.)Não informado. Building Services. Chartered Institution of Building Services Engineers, 1985.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.