MLA

Map, Sanborn, and issuing body Publishing Co. Naugatuck, Connecticut. 1887. https://collections.library.yale.edu/catalog/11140203.

APA, 6th edition

Map, S., & Publishing Co., issuing body. (1887). Naugatuck, Connecticut. [Atlases, Cadastral maps, Connecticut, Fire insurance maps, local, Naugatuck]. https://collections.library.yale.edu/catalog/11140203.