Não informado. (2009). Science, Technology and Innovation. British Library, Science Reference and Information Service.
Citação do estilo Chicago (17ª ed.)Não informado. Science, Technology and Innovation. London: British Library, Science Reference and Information Service, 2009.
Citação MLA (8ª ed.)Não informado. Science, Technology and Innovation. British Library, Science Reference and Information Service, 2009.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.