APA (7th ed.) Citation

Jacobsen, J., & Firor, J. (1992). Human impact on the environment: Ancient roots, current challenges. Westview.

Chicago Style (17th ed.) Citation

Jacobsen, Judith, and John Firor. Human Impact on the Environment: Ancient Roots, Current Challenges. Boulder: Westview, 1992.

MLA (9th ed.) Citation

Jacobsen, Judith, and John Firor. Human Impact on the Environment: Ancient Roots, Current Challenges. Westview, 1992.