MLA

Sanborn Map Company, issuing body. New Milford, Litchfield County, Conn. 1904. https://collections.library.yale.edu/catalog/11551284.

APA, 6th edition

Sanborn Map Company, issuing body. (1904). New Milford, Litchfield County, Conn. [Atlases--Connecticut--New Milford--1904, Cadastral maps--Connecticut--New Milford--1904, Fire insurance maps--Connecticut--New Milford--1904]. https://collections.library.yale.edu/catalog/11551284.