MLA

Map, Sanborn, and issuing body Publishing Co. Stratford, Conn. 1887. https://collections.library.yale.edu/catalog/11634547.

APA, 6th edition

Map, S., & Publishing Co., issuing body. (1887). Stratford, Conn. [Cadastral maps--Connecticut--Stratford--1887, Fire insurance maps--Connecticut--Stratford--1887]. https://collections.library.yale.edu/catalog/11634547.