APA (7th ed.) Citation

(1956). Catalogue of old master and modern engravings and etchings ..: Day of sale: Wednesday, October 31st, 1956. Sotheby & Co.

Chicago Style (17th ed.) Citation

Catalogue of Old Master and Modern Engravings and Etchings ..: Day of Sale: Wednesday, October 31st, 1956. London: Sotheby & Co, 1956.

MLA (9th ed.) Citation

Catalogue of Old Master and Modern Engravings and Etchings ..: Day of Sale: Wednesday, October 31st, 1956. Sotheby & Co, 1956.