MLA

Sanborn-Perris Map Co., issuing body. Essex, Middlesex Co., Conn. 1895. https://collections.library.yale.edu/catalog/11116904.

APA, 6th edition

Sanborn-Perris Map Co., issuing body. (1895). Essex, Middlesex Co., Conn. [Atlases, Cadastral maps, Connecticut, Essex (Town), Fire insurance maps, local]. https://collections.library.yale.edu/catalog/11116904.