MLA

Sanborn Map Company, issuing body. Dayville, Windham County, Connecticut. 1917. https://collections.library.yale.edu/catalog/11105773.

APA, 6th edition

Sanborn Map Company, issuing body. (1917). Dayville, Windham County, Connecticut. [Atlases, Cadastral maps, Connecticut, Fire insurance maps, Killingly (Town), local]. https://collections.library.yale.edu/catalog/11105773.