The Center for Environmental Philosophy. Environmental Ethics, Volume 9, Number 1, Spring 1987. UNT Digital Library. http://digital.library.unt.edu/ark:/67531/metadc233317/. Accessed September 2, 2014.
Note: Inconsistencies in capitalization and punctuation within the Digital Library may affect this citation. Before using this citation in formal writing, please consult your preferred style manual. More information.