MLA

Sanborn Map Company, issuing body. Salisbury, Litchfield County, Connecticut. 1909. https://collections.library.yale.edu/catalog/11605568.

APA, 6th edition

Sanborn Map Company, issuing body. (1909). Salisbury, Litchfield County, Connecticut. [Cadastral maps--Connecticut--Salisbury--1909, Fire insurance maps--Connecticut--Salisbury--1909]. https://collections.library.yale.edu/catalog/11605568.