MLA

Sanborn-Perris Map Co., issuing body. Insurance Maps of New Haven, Connecticut., Insurance Maps of New Haven, Connecticut: [New and Additional Sheets]. 0AD. https://collections.library.yale.edu/catalog/11687443.

APA, 6th edition

Sanborn-Perris Map Co., issuing body. (0 C.E.). Insurance maps of New Haven, Connecticut., Insurance maps of New Haven, Connecticut: [New and additional sheets]. [Atlases--Connecticut--New Haven--1901, Cadastral maps--Connecticut--New Haven--1901, Fire insurance maps--Connecticut--New Haven--1901]. https://collections.library.yale.edu/catalog/11687443.