MLA

Sanborn Map Company, issuing body. Insurance Maps of New Haven, Connecticut. Volume 2. 1924. https://collections.library.yale.edu/catalog/11190119.

APA, 6th edition

Sanborn Map Company, issuing body. (1924). Insurance maps of New Haven, Connecticut. Volume 2. [Atlases, Cadastral maps, Connecticut, East Haven, East Haven, Fire insurance maps, Hamden, local, New Haven, North Haven, West Haven]. https://collections.library.yale.edu/catalog/11190119.