MLA

Sanborn Map Company, issuing body. Insurance Maps of Winsted, Litchfield County, Connecticut. 1904. https://collections.library.yale.edu/catalog/11681837.

APA, 6th edition

Sanborn Map Company, issuing body. (1904). Insurance maps of Winsted, Litchfield County, Connecticut. [Atlases--Connecticut--Winsted--1904, Cadastral maps--Connecticut--Winsted--1904, Fire insurance maps--Connecticut--Winsted--1904]. https://collections.library.yale.edu/catalog/11681837.