MLA

Sanborn-Perris Map Co., issuing body. Insurance Maps of Bridgeport, Connecticut. 1898. https://collections.library.yale.edu/catalog/11037152.

APA, 6th edition

Sanborn-Perris Map Co., issuing body. (1898). Insurance maps of Bridgeport, Connecticut. [Annotations (Provenance), Atlases, Bridgeport, Cadastral maps, Connecticut, CtY-BR, Fire insurance maps, local, rbprov]. https://collections.library.yale.edu/catalog/11037152.