MLA

Sanborn Map Company, issuing body. Torrington, Litchfield County, Connecticut. 1924. https://collections.library.yale.edu/catalog/11674899.

APA, 6th edition

Sanborn Map Company, issuing body. (1924). Torrington, Litchfield County, Connecticut. [Atlases--Connecticut--Torrington--1924, Cadastral maps--Connecticut--Torrington--1924, Fire insurance maps--Connecticut--Torrington--1924]. https://collections.library.yale.edu/catalog/11674899.