MLA

Sanborn Map Company, issuing body. North Grosvenordale, Windham County, Connecticut. 1927. https://collections.library.yale.edu/catalog/11580214.

APA, 6th edition

Sanborn Map Company, issuing body. (1927). North Grosvenordale, Windham County, Connecticut. [Atlases--Connecticut--North Grosvenordale--1927, Cadastral maps--Connecticut--North Grosvenordale--1927, Fire insurance maps--Connecticut--North Grosvenordale--1927]. https://collections.library.yale.edu/catalog/11580214.