APA-referens (7:e uppl.)
Sotheby's. Sotheby's: London, Thursday 6th October 1988 : Fine Jewels and Jewels for the Collector. Sotheby's.
Chicago-referens (17:e uppl.)
Sotheby's. Sotheby's: London, Thursday 6th October 1988 : Fine Jewels and Jewels for the Collector. Londres, Inglaterra: Sotheby's.
MLA-referens (9:e uppl.)
Sotheby's. Sotheby's: London, Thursday 6th October 1988 : Fine Jewels and Jewels for the Collector. Sotheby's.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.