APA (7th ed.) Citation

Sotheby Parke Bernet Group. (1980). Important old master paintings - April 1980. Sotheby.

Chicago Style (17th ed.) Citation

Sotheby Parke Bernet Group. Important Old Master Paintings - April 1980. London: Sotheby, 1980.

MLA (9th ed.) Citation

Sotheby Parke Bernet Group. Important Old Master Paintings - April 1980. Sotheby, 1980.

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