Bradley, Timothy J. "Terrestrial animals." Animal Osmoregulation. : Oxford University Press, 2008-12-25. Oxford Scholarship Online. 2010-04-01. Date Accessed 23 May. 2013 <http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780198569961.001.0001/acprof-9780198569961-chapter-8>.
Bradley, T.(2008-12-25). Terrestrial animals. In Animal Osmoregulation. : Oxford University Press. Retrieved 23 May. 2013, from http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780198569961.001.0001/acprof-9780198569961-chapter-8.
Bradley, Timothy J. "Terrestrial animals." In Animal Osmoregulation. : Oxford University Press, 2008-12-25. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780198569961.001.0001/acprof-9780198569961-chapter-8.
Bradley TJ. Terrestrial animals. In: Bradley TJ. Animal Osmoregulation. Oxford University Press; 2008. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780198569961.001.0001/acprof-9780198569961-chapter-8. Accessed May 23, 2013.