APA (7th ed.) Citation

MacKenzie, J. J., & El-Ashry, M. T. (1989). Air pollution's toll on forests and crops. Yale University Press.

Chicago Style (17th ed.) Citation

MacKenzie, James J., and Mohamed T. El-Ashry. Air Pollution's Toll on Forests and Crops. New Haven: Yale University Press, 1989.

MLA (8th ed.) Citation

MacKenzie, James J., and Mohamed T. El-Ashry. Air Pollution's Toll on Forests and Crops. Yale University Press, 1989.