MLA

Sanborn-Perris Map Co., issuing body. Insurance Maps of New Britain, Hartford County, Connecticut. 1901. https://collections.library.yale.edu/catalog/11175780.

APA, 6th edition

Sanborn-Perris Map Co., issuing body. (1901). Insurance maps of New Britain, Hartford County, Connecticut. [Atlases, Cadastral maps, Connecticut, Fire insurance maps, local, New Britain]. https://collections.library.yale.edu/catalog/11175780.