APA-Zitierstil (7. Ausg.)

Ashworth, W. (2001). Encyclopedia of environmental studies (New ed.). Facts on File.

Chicago-Zitierstil (17. Ausg.)

Ashworth, William. Encyclopedia of Environmental Studies. New ed. New York: Facts on File, 2001.

MLA-Zitierstil (9. Ausg.)

Ashworth, William. Encyclopedia of Environmental Studies. New ed. Facts on File, 2001.