MLA

Map, Sanborn, and issuing body Publishing Co. Bridgeport, Connecticut. 1889. https://collections.library.yale.edu/catalog/11036940.

APA, 6th edition

Map, S., & Publishing Co., issuing body. (1889). Bridgeport, Connecticut. [Atlases, Bridgeport, Cadastral maps, Connecticut, Fire insurance maps, local]. https://collections.library.yale.edu/catalog/11036940.