MLA

Sanborn Map Company, issuing body. Insurance Maps of Hartford, Connecticut. Volume 1. 1922. https://collections.library.yale.edu/catalog/11129231.

APA, 6th edition

Sanborn Map Company, issuing body. (1922). Insurance maps of Hartford, Connecticut. Volume 1. [Atlases--Connecticut--Hartford--1922-1923.--local, Atlases--Connecticut--West Hartford--1922-1923.--local, Cadastral maps--Connecticut--Hartford--1922-1923.--local, Cadastral maps--Connecticut--West Hartford--1922-1923.--local, Fire insurance maps--Connecticut--Hartford--1922-1923.--local, Fire insurance maps--Connecticut--West Hartford--1922-1923.--local]. https://collections.library.yale.edu/catalog/11129231.