APA (7th ed.) Citation

Thoreau, H. D., Hovde, C., Howarth, W. L., & Witherell, E. H. (2004). A week on the Concord and Merrimack rivers. Princeton University Press.

Chicago Style (17th ed.) Citation

Thoreau, Henry David, Carl Hovde, William L. Howarth, and Elizabeth Hall Witherell. A Week on the Concord and Merrimack Rivers. Princeton, N.J. ; Oxford: Princeton University Press, 2004.

MLA (8th ed.) Citation

Thoreau, Henry David, et al. A Week on the Concord and Merrimack Rivers. Princeton University Press, 2004.