Não informado. (1973). Index of Conference Proceedings Received. British Library, Lending Division.
Chicago-referens (17:e uppl.)Não informado. Index of Conference Proceedings Received. Boston, Inglaterra: British Library, Lending Division, 1973.
MLA-referens (8:e uppl.)Não informado. Index of Conference Proceedings Received. British Library, Lending Division, 1973.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.