Sotheby's (Firm). (1969). Fine engravings, etchings and woodcuts - March 1969. Sotheby.
Chicago Style (17th ed.) CitationSotheby's (Firm). Fine Engravings, Etchings and Woodcuts - March 1969. London: Sotheby, 1969.
MLA (9th ed.) CitationSotheby's (Firm). Fine Engravings, Etchings and Woodcuts - March 1969. Sotheby, 1969.
Warning: These citations may not always be 100% accurate.