Thomas, C. (1889). The circular, square, and octagonal earthworks of Ohio. Washington [DC]: Govt. Print. Off..
Chicago Style CitationThomas, Cyrus. The Circular, Square, and Octagonal Earthworks of Ohio. Washington [DC]: Govt. Print. Off., 1889.
MLA CitationThomas, Cyrus. The Circular, Square, and Octagonal Earthworks of Ohio. Washington [DC]: Govt. Print. Off., 1889.
Warning: These citations may not always be 100% accurate.