Cita APA (7a ed.)
Sotheby's. (1999). Sotheby's: London, Monday 7 June 1999 : Travel, Natural History, Atlases and Maps. Sotheby's.
Cita estilo Chicago (17a ed.)
Sotheby's. Sotheby's: London, Monday 7 June 1999 : Travel, Natural History, Atlases and Maps. Londres, Inglaterra: Sotheby's, 1999.
Cita MLA (9a ed.)
Sotheby's. Sotheby's: London, Monday 7 June 1999 : Travel, Natural History, Atlases and Maps. Sotheby's, 1999.
Precaución: Estas citas no son 100% exactas.