Sotheby's : : Art at Auction 1990 - '91 / / Edited by Sally Prideaux ; authors Timothy Sammons, Hugh Brigstocke, John Tancock, ...(et al.).

MLA

Prideaux, Sally, et al. Sotheby's : Art At Auction 1990 - '91. London: Sotheby's Publications, 1991.

APA

Prideaux, S., Sammons, T., Brigstocke, H., & Tancock, J. (1991). Sotheby's : Art at Auction 1990 - '91. London: Sotheby's Publications.

Chicago

Prideaux, Sally, Timothy Sammons, Hugh Brigstocke, and John Tancock. Sotheby's: Art At Auction 1990 - '91. London: Sotheby's Publications, 1991.