MLA

Sanborn Map Company, issuing body. Insurance Maps of Waterbury, New Haven Co., Connecticut. Volume 2. 1922. https://collections.library.yale.edu/catalog/11676428.

APA, 6th edition

Sanborn Map Company, issuing body. (1922). Insurance maps of Waterbury, New Haven Co., Connecticut. Volume 2. [Atlases--Connecticut--Waterbury--1922, Cadastral maps--Connecticut--Waterbury--1922, Fire insurance maps--Connecticut--Waterbury--1922]. https://collections.library.yale.edu/catalog/11676428.