Library of Congress. Geography and Map Division & Shelley, M. H. (1975). Ward maps of United States cities: A selective checklist of pre-1900 maps in the Library of Congress. Library of Congress.
Chicago Style (17th ed.) CitationLibrary of Congress. Geography and Map Division and Michael H. Shelley. Ward Maps of United States Cities: A Selective Checklist of Pre-1900 Maps in the Library of Congress. Washington: Library of Congress, 1975.
MLA (9th ed.) CitationLibrary of Congress. Geography and Map Division and Michael H. Shelley. Ward Maps of United States Cities: A Selective Checklist of Pre-1900 Maps in the Library of Congress. Library of Congress, 1975.
Warning: These citations may not always be 100% accurate.