Não informado. (1952). Studies in conservation. International Institute for the Conservation of Historic and Artistic.
Chicago-referens (17:e uppl.)Não informado. Studies in Conservation. London: International Institute for the Conservation of Historic and Artistic, 1952.
MLA-referens (8:e uppl.)Não informado. Studies in Conservation. International Institute for the Conservation of Historic and Artistic, 1952.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.