"Journal of Perinatal Medicine", 27.5 (1999): 327-408. Retrieved 22 May. 2013, from http://www.degruyter.com/view/j/jpme.1999.27.issue-5/issue-files/jpme.1999.27.issue-5.xml

Journal of Perinatal Medicine (1999), 27(5), pp. 327-408. Retrieved 22 May. 2013, from http://www.degruyter.com/view/j/jpme.1999.27.issue-5/issue-files/jpme.1999.27.issue-5.xml

Journal of Perinatal Medicine. 1999. 27(5): 327-408. Retrieved 22 May. 2013, from http://www.degruyter.com/view/j/jpme.1999.27.issue-5/issue-files/jpme.1999.27.issue-5.xml