Smithsonian Institution. Bureau of American Ethnology & Thomas, C. (1889). Problem of Ohio mounds. U.S. Government Printing Office.
Chicago Style (17th ed.) CitationSmithsonian Institution. Bureau of American Ethnology and Cyrus Thomas. Problem of Ohio Mounds. [Place of publication not identified]: U.S. Government Printing Office, 1889.
MLA (9th ed.) CitationSmithsonian Institution. Bureau of American Ethnology and Cyrus Thomas. Problem of Ohio Mounds. U.S. Government Printing Office, 1889.
Warning: These citations may not always be 100% accurate.