MLA

Map, Sanborn, and issuing body Publishing Co. Greenwich, Conn. 1885. https://collections.library.yale.edu/catalog/11128858.

APA, 6th edition

Map, S., & Publishing Co., issuing body. (1885). Greenwich, Conn. [Atlases--Connecticut--Greenwich (Town)--1885.--local, Cadastral maps--Connecticut--Greenwich (Town)--1885.--local]. https://collections.library.yale.edu/catalog/11128858.