APA استشهاد

Bell, S. M. (2006). Evironmental law (6th ed.). Oxford Universtiy Press.

استشهاد بنمط شيكاغو

Bell, Stuart McGillivary. Evironmental Law. 6th ed. New York: Oxford Universtiy Press, 2006.

MLA استشهاد

Bell, Stuart McGillivary. Evironmental Law. 6th ed. Oxford Universtiy Press, 2006.