Não informado. (2009). Science, Technology and Innovation. British Library, Science Reference and Information Service.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Science, Technology and Innovation. London: British Library, Science Reference and Information Service, 2009.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Science, Technology and Innovation. British Library, Science Reference and Information Service, 2009.
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