Loudon, Irvine. "Abortion." Death in Childbirth: An International Study of Maternal Care and Maternal Mortality 1800-1950. : Oxford University Press, 1992-11-05. Oxford Scholarship Online. 2011-10-03. Date Accessed 20 Jun. 2013 <http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780198229971.001.0001/acprof-9780198229971-chapter-8>.
Loudon, I.(1992-11-05). Abortion. In Death in Childbirth: An International Study of Maternal Care and Maternal Mortality 1800-1950. : Oxford University Press. Retrieved 20 Jun. 2013, from http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780198229971.001.0001/acprof-9780198229971-chapter-8.
Loudon, Irvine. "Abortion." In Death in Childbirth: An International Study of Maternal Care and Maternal Mortality 1800-1950. : Oxford University Press, 1992-11-05. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780198229971.001.0001/acprof-9780198229971-chapter-8.
Loudon I. Abortion. In: Loudon I. Death in Childbirth: An International Study of Maternal Care and Maternal Mortality 1800-1950. Oxford University Press; 1992. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780198229971.001.0001/acprof-9780198229971-chapter-8. Accessed June 20, 2013.