MLA

Sanborn Map Company, issuing body. Newtown, Fairfield Co., Conn. 1906. https://collections.library.yale.edu/catalog/11580146.

APA, 6th edition

Sanborn Map Company, issuing body. (1906). Newtown, Fairfield Co., Conn. [Atlases--Connecticut--Newtown--1906, Cadastral maps--Connecticut--Newtown--1906, Fire insurance maps--Connecticut--Newtown--1906]. https://collections.library.yale.edu/catalog/11580146.