MLA

Sanborn-Perris Map Co., issuing body. Putnam, Windham Co., Conn. 1897. https://collections.library.yale.edu/catalog/11594407.

APA, 6th edition

Sanborn-Perris Map Co., issuing body. (1897). Putnam, Windham Co., Conn. [Atlases--Connecticut--Putnam--1897, Cadastral maps--Connecticut--Putnam--1897, Fire insurance maps--Connecticut--Putnam--1897]. https://collections.library.yale.edu/catalog/11594407.