MLA

Sanborn Map Company, issuing body. Insurance Maps of Milford, New Haven County, Connecticut. 1920. https://collections.library.yale.edu/catalog/11139739.

APA, 6th edition

Sanborn Map Company, issuing body. (1920). Insurance maps of Milford, New Haven County, Connecticut. [Atlases, Cadastral maps, Connecticut, Fire insurance maps, local, Milford]. https://collections.library.yale.edu/catalog/11139739.