Pimental, D., Westra, L., & Noss, R. F. (2001). Ecological integrity: Integrating environment, conservation, and health. Island Press.

Pimental, David, Laura Westra, and Reed F. Noss. Ecological Integrity: Integrating Environment, Conservation, and Health. Washington, D.C.: Island Press, 2001.

Pimental, David, et al. Ecological Integrity: Integrating Environment, Conservation, and Health. Island Press, 2001.