"Journal of Perinatal Medicine - Official Journal of the WAPM", 10.4 (1982): 185-219. Retrieved 20 Jun. 2013, from http://www.degruyter.com/view/j/jpme.1982.10.issue-4/issue-files/jpme.1982.10.issue-4.xml

Journal of Perinatal Medicine - Official Journal of the WAPM (1982), 10(4), pp. 185-219. Retrieved 20 Jun. 2013, from http://www.degruyter.com/view/j/jpme.1982.10.issue-4/issue-files/jpme.1982.10.issue-4.xml

Journal of Perinatal Medicine - Official Journal of the WAPM. 1982. 10(4): 185-219. Retrieved 20 Jun. 2013, from http://www.degruyter.com/view/j/jpme.1982.10.issue-4/issue-files/jpme.1982.10.issue-4.xml