MLA

Sanborn Map Company, issuing body. Southington, Including Plantsville and Milldale, Hartford County, Connecticut. 1923. https://collections.library.yale.edu/catalog/11624106.

APA, 6th edition

Sanborn Map Company, issuing body. (1923). Southington, including Plantsville and Milldale, Hartford County, Connecticut. [Atlases--Connecticut--Southington--1923, Cadastral maps--Connecticut--Southington--1923, Fire insurance maps--Connecticut--Southington--1923]. https://collections.library.yale.edu/catalog/11624106.