Map of Newport County, Rhode Island from original Surveys by N.F. Walling
MLA
Map of Newport County, Rhode Island from Original Surveys by N.F. Walling. 1850. https://collections.library.yale.edu/catalog/15654699.
APA, 6th edition
Map of Newport County, Rhode Island from original Surveys by N.F. Walling. (1850). [Maps]. https://collections.library.yale.edu/catalog/15654699.