MLA

Sanborn-Perris Map Co., issuing body. Insurance Maps of New London, Including Groton, New London Co., Connecticut. 1896. https://collections.library.yale.edu/catalog/11202166.

APA, 6th edition

Sanborn-Perris Map Co., issuing body. (1896). Insurance maps of New London, including Groton, New London Co., Connecticut. [Atlases, Cadastral maps, Connecticut, Fire insurance maps, Groton, local, New London]. https://collections.library.yale.edu/catalog/11202166.