MLA

Map, Sanborn, and issuing body Publishing Co. East Haddam, Conn. 1884. https://collections.library.yale.edu/catalog/11108016.

APA, 6th edition

Map, S., & Publishing Co., issuing body. (1884). East Haddam, Conn. [Cadastral maps--Connecticut--East Haddam (Town)--1884, Fire insurance maps--Connecticut--East Haddam (Town)--1884]. https://collections.library.yale.edu/catalog/11108016.