Trial and Error: The American Controversy Over Creation and Evolution. : Oxford University Press, 2003-01-23. Oxford Scholarship Online. 2011-10-03. Date Accessed 20 May. 2013 <http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195154719.001.0001/acprof-9780195154719>.
(2003-01-23). Trial and Error: The American Controversy Over Creation and Evolution. : Oxford University Press. Retrieved 20 May. 2013, from http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195154719.001.0001/acprof-9780195154719.
Trial and Error: The American Controversy Over Creation and Evolution. : Oxford University Press, 2003-01-23. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195154719.001.0001/acprof-9780195154719.
Larson EJ. Trial and Error: The American Controversy Over Creation and Evolution. Oxford University Press; 2003. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195154719.001.0001/acprof-9780195154719. Accessed May 20, 2013.