Epidemiology and the People’s Health: Theory and Context. : Oxford University Press, 2011-03-23. Oxford Scholarship Online. 2011-05-01. Date Accessed 19 Jun. 2013 <http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195383874.001.0001/acprof-9780195383874>.
(2011-03-23). Epidemiology and the People’s Health: Theory and Context. : Oxford University Press. Retrieved 19 Jun. 2013, from http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195383874.001.0001/acprof-9780195383874.
Epidemiology and the People’s Health: Theory and Context. : Oxford University Press, 2011-03-23. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195383874.001.0001/acprof-9780195383874.
Krieger N. Epidemiology and the People’s Health: Theory and Context. Oxford University Press; 2011. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195383874.001.0001/acprof-9780195383874. Accessed June 19, 2013.