Baltic, New London County, Connecticut.
MLA
Sanborn Map Company, issuing body. Baltic, New London County, Connecticut. 1932. https://collections.library.yale.edu/catalog/11034850.
APA, 6th edition
Sanborn Map Company, issuing body. (1932). Baltic, New London County, Connecticut. [Atlases, Cadastral maps, Connecticut, Fire insurance maps, local, Sprague (Town)]. https://collections.library.yale.edu/catalog/11034850.