APA (7th ed.) Zitazioa
Sotheby's. (2004). Sotheby's: London, Thursday 13 May 2004 : Natural History, Travel, Atlases and Maps. Sotheby's.
Chicago Style (17th ed.) Zitazioa
Sotheby's. Sotheby's: London, Thursday 13 May 2004 : Natural History, Travel, Atlases and Maps. Londres, Inglaterra: Sotheby's, 2004.
MLA (9th ed.) Zitazioa
Sotheby's. Sotheby's: London, Thursday 13 May 2004 : Natural History, Travel, Atlases and Maps. Sotheby's, 2004.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.