MLA

Map, Sanborn, and issuing body Publishing Co. Sandy Hook, Conn. 1885. https://collections.library.yale.edu/catalog/11605572.

APA, 6th edition

Map, S., & Publishing Co., issuing body. (1885). Sandy Hook, Conn. [Atlases--Connecticut--Newtown--Sandy Hook--1885, Cadastral maps--Connecticut--Newtown--Sandy Hook--1885, Fire insurance maps--Connecticut--Newtown--Sandy Hook--1885]. https://collections.library.yale.edu/catalog/11605572.