MLA

Sanborn-Perris Map Co., issuing body. Insurance Maps of Ansonia, New Haven Co., Connecticut. 1900. https://collections.library.yale.edu/catalog/11021547.

APA, 6th edition

Sanborn-Perris Map Co., issuing body. (1900). Insurance maps of Ansonia, New Haven Co., Connecticut. [Atlases, Cadastral maps, Connecticut, Fire insurance maps, local]. https://collections.library.yale.edu/catalog/11021547.