MLA

Sanborn-Perris Map Co., issuing body. Wallingford, New Haven Co., Conn. 1897. https://collections.library.yale.edu/catalog/11675885.

APA, 6th edition

Sanborn-Perris Map Co., issuing body. (1897). Wallingford, New Haven Co., Conn. [Atlases--Connecticut--Wallingford--1897, Cadastral maps--Connecticut--Wallingford--1897, Fire insurance maps--Connecticut--Wallingford--1897]. https://collections.library.yale.edu/catalog/11675885.