APA (7th ed.) Citation

Sotheby's. (2013). Contemporary art: London day sale 15 February 2013 at 2 pm. Sotheby's.

Chicago Style (17th ed.) Citation

Sotheby's. Contemporary Art: London Day Sale 15 February 2013 at 2 Pm. London: Sotheby's, 2013.

MLA (9th ed.) Citation

Sotheby's. Contemporary Art: London Day Sale 15 February 2013 at 2 Pm. Sotheby's, 2013.

Warning: These citations may not always be 100% accurate.