APA (7th ed.) Citation

(1961). Catalogue of valuable printed books ..: Day of sale: Monday, April, 24th, 1961 .. Sotheby & Co.

Chicago Style (17th ed.) Citation

Catalogue of Valuable Printed Books ..: Day of Sale: Monday, April, 24th, 1961 .. London: Sotheby & Co, 1961.

MLA (9th ed.) Citation

Catalogue of Valuable Printed Books ..: Day of Sale: Monday, April, 24th, 1961 .. Sotheby & Co, 1961.

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