MLA

Sanborn Map Company, issuing body. Suffield, Hartford County, Connecticut. 1912. https://collections.library.yale.edu/catalog/11665583.

APA, 6th edition

Sanborn Map Company, issuing body. (1912). Suffield, Hartford County, Connecticut. [Atlases--Connecticut--Suffield--1912, Cadastral maps--Connecticut--Suffield--1912, Fire insurance maps--Connecticut--Suffield--1912]. https://collections.library.yale.edu/catalog/11665583.