Cita APA (7th ed.)
Sotheby's. (2008). Sotheby's: London, Thursday 13 November 2008 : Natural History, Travel, Atlases and Maps. Sotheby's.
Cita Chicago (17th ed.)
Sotheby's. Sotheby's: London, Thursday 13 November 2008 : Natural History, Travel, Atlases and Maps. Londres, Inglaterra: Sotheby's, 2008.
Cita MLA (9th ed.)
Sotheby's. Sotheby's: London, Thursday 13 November 2008 : Natural History, Travel, Atlases and Maps. Sotheby's, 2008.
Atenció: Aquestes cites poden no estar 100% correctes.