MLA

Sanborn Map Company, issuing body. Insurance Maps of Naugatuck, New Haven County, Connecticut. 1910. https://collections.library.yale.edu/catalog/11140207.

APA, 6th edition

Sanborn Map Company, issuing body. (1910). Insurance maps of Naugatuck, New Haven County, Connecticut. [Atlases, Cadastral maps, Connecticut, Fire insurance maps, local, Naugatuck]. https://collections.library.yale.edu/catalog/11140207.