Clifford, H. (1993). 20th century silver: Curated by Helen Clifford. Crafts Council.
Chicago-referens (17:e uppl.)Clifford, Helen. 20th Century Silver: Curated by Helen Clifford. [London]: Crafts Council, 1993.
MLA-referens (8:e uppl.)Clifford, Helen. 20th Century Silver: Curated by Helen Clifford. Crafts Council, 1993.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.