Não informado. (1978). International Building Services Abstracts. Building Services Research and Information Association.
Citação do estilo Chicago (17ª ed.)Não informado. International Building Services Abstracts. Bracknell, Inglaterra: Building Services Research and Information Association, 1978.
Citação MLA (8ª ed.)Não informado. International Building Services Abstracts. Building Services Research and Information Association, 1978.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.