MLA

Sanborn Map Company, issuing body. North Grosvenordale, Windham County, Connecticut. 1917. https://collections.library.yale.edu/catalog/11580213.

APA, 6th edition

Sanborn Map Company, issuing body. (1917). North Grosvenordale, Windham County, Connecticut. [Atlases--Connecticut--North Grosvenordale--1917, Cadastral maps--Connecticut--North Grosvenordale--1917, Fire insurance maps--Connecticut--North Grosvenordale--1917]. https://collections.library.yale.edu/catalog/11580213.