"Journal of Perinatal Medicine", 39.4 (2011): 361-487. Retrieved 19 Jun. 2013, from http://www.degruyter.com/view/j/jpme.2011.39.issue-4/issue-files/jpme.2011.39.issue-4.xml

Journal of Perinatal Medicine (2011), 39(4), pp. 361-487. Retrieved 19 Jun. 2013, from http://www.degruyter.com/view/j/jpme.2011.39.issue-4/issue-files/jpme.2011.39.issue-4.xml

Journal of Perinatal Medicine. 2011. 39(4): 361-487. Retrieved 19 Jun. 2013, from http://www.degruyter.com/view/j/jpme.2011.39.issue-4/issue-files/jpme.2011.39.issue-4.xml