MLA

Sanborn Map Company, issuing body. Rockville, Tolland County, Connecticut. 1903. https://collections.library.yale.edu/catalog/11595818.

APA, 6th edition

Sanborn Map Company, issuing body. (1903). Rockville, Tolland County, Connecticut. [Atlases--Connecticut--Rockville--1903, Cadastral maps--Connecticut--Naugatuck--1903, Fire insurance maps--Connecticut--Rockville--1903]. https://collections.library.yale.edu/catalog/11595818.