MLA

Sanborn-Perris Map Co., issuing body. Thomaston, Litchfield Co., Conn. 1895. https://collections.library.yale.edu/catalog/11671981.

APA, 6th edition

Sanborn-Perris Map Co., issuing body. (1895). Thomaston, Litchfield Co., Conn. [Atlases--Connecticut--Thomaston--1895, Cadastral maps--Connecticut--Thomaston--1895, Fire insurance maps--Connecticut--Thomaston--1895]. https://collections.library.yale.edu/catalog/11671981.