MLA

Sanborn-Perris Map Co., issuing body. Insurance Maps of New Haven, Connecticut. Volume 1. 1901. https://collections.library.yale.edu/catalog/11188890.

APA, 6th edition

Sanborn-Perris Map Co., issuing body. (1901). Insurance maps of New Haven, Connecticut. Volume 1. [Atlases, Cadastral maps, Connecticut, Fire insurance maps, local, New Haven]. https://collections.library.yale.edu/catalog/11188890.