Library of Congress. Map Division & Le Gear, C. E. (1949). Maps: Their care, repair and preservation in libraries. Library of Congress.
Chicago Style (17th ed.) CitationLibrary of Congress. Map Division and Clara Egli Le Gear. Maps: Their Care, Repair and Preservation in Libraries. Washington: Library of Congress, 1949.
MLA (9th ed.) CitationLibrary of Congress. Map Division and Clara Egli Le Gear. Maps: Their Care, Repair and Preservation in Libraries. Library of Congress, 1949.
Warning: These citations may not always be 100% accurate.