Não informado. (1987). FID Directory. International Federation for Information and Documentation.
Chicago-referens (17:e uppl.)Não informado. FID Directory. The Hague, Holanda: International Federation for Information and Documentation, 1987.
MLA-referens (8:e uppl.)Não informado. FID Directory. International Federation for Information and Documentation, 1987.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.