United States. Census Office & Gannett, H. (1881). Extra census bulletin: The area of the United States, the several states and territories, and their counties. Govt. Print. Off..
Chicago Style (17th ed.) CitationUnited States. Census Office and Henry Gannett. Extra Census Bulletin: The Area of the United States, the Several States and Territories, and Their Counties. Washington: Govt. Print. Off., 1881.
MLA (8th ed.) CitationUnited States. Census Office and Henry Gannett. Extra Census Bulletin: The Area of the United States, the Several States and Territories, and Their Counties. Govt. Print. Off., 1881.
Warning: These citations may not always be 100% accurate.