Norfolk, Litchfield County, Connecticut.
MLA
Sanborn Map Company, issuing body. Norfolk, Litchfield County, Connecticut. 1909. https://collections.library.yale.edu/catalog/11580204.
APA, 6th edition
Sanborn Map Company, issuing body. (1909). Norfolk, Litchfield County, Connecticut. [Atlases--Connecticut--Norfolk--1909, Cadastral maps--Connecticut--Norfolk--1909, Fire insurance maps--Connecticut--Norfolk--1909]. https://collections.library.yale.edu/catalog/11580204.