APA (7th ed.) Citation

Sotheby's (Firm). (1970). Catalogue of fine nineteenth century and modern etchings, lithographs and woodcuts ... December 1970. Sotheby.

Chicago Style (17th ed.) Citation

Sotheby's (Firm). Catalogue of Fine Nineteenth Century and Modern Etchings, Lithographs and Woodcuts ... December 1970. London: Sotheby, 1970.

MLA (9th ed.) Citation

Sotheby's (Firm). Catalogue of Fine Nineteenth Century and Modern Etchings, Lithographs and Woodcuts ... December 1970. Sotheby, 1970.

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