APA (7th ed.) Citation

Ritchie, W. A. (1958). An introduction to Hudson Valley prehistory. University of the State of New York, State Education Dept.

Chicago Style (17th ed.) Citation

Ritchie, William Augustus. An Introduction to Hudson Valley Prehistory. Albany, N.Y: University of the State of New York, State Education Dept, 1958.

MLA (9th ed.) Citation

Ritchie, William Augustus. An Introduction to Hudson Valley Prehistory. University of the State of New York, State Education Dept, 1958.