MLA

Sanborn Map Company, issuing body. Westport, Fairfield County, Connecticut. 1910. https://collections.library.yale.edu/catalog/11676588.

APA, 6th edition

Sanborn Map Company, issuing body. (1910). Westport, Fairfield County, Connecticut. [Atlases--Connecticut--Saugatuck--1910, Atlases--Connecticut--Westport--1910, Cadastral maps--Connecticut--Saugatuck--1910, Cadastral maps--Connecticut--Westport--1910, Fire insurance maps--Connecticut--Saugatuck--1910, Fire insurance maps--Connecticut--Westport--1910]. https://collections.library.yale.edu/catalog/11676588.