APA (7th ed.) Citation

Gilliam, F. S., & Roberts, M. R. (2003). The herbaceous layer in forests of eastern North America. Oxford University Press.

Chicago Style (17th ed.) Citation

Gilliam, Frank S., and Mark R. Roberts. The Herbaceous Layer in Forests of Eastern North America. New York: Oxford University Press, 2003.

MLA (9th ed.) Citation

Gilliam, Frank S., and Mark R. Roberts. The Herbaceous Layer in Forests of Eastern North America. Oxford University Press, 2003.