London. National Gallery. (1955). Art treasures of the National Gallery, London (2nd ed.). Abrams.
Chicago-referens (17:e uppl.)London. National Gallery. Art Treasures of the National Gallery, London. 2nd ed. New York: Abrams, 1955.
MLA-referens (9:e uppl.)London. National Gallery. Art Treasures of the National Gallery, London. 2nd ed. Abrams, 1955.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.