"Announcement" Journal of Perinatal Medicine - Official Journal of the WAPM, 15.2 (2009): 128-128. Retrieved 19 Jun. 2013, from doi:10.1515/jpme.1987.15.2.128

Announcement. Journal of Perinatal Medicine - Official Journal of the WAPM (2009), 15(2), pp. 117-216. Retrieved 19 Jun. 2013, from doi:10.1515/jpme.1987.15.2.128

Announcement. Journal of Perinatal Medicine - Official Journal of the WAPM. 2009. 15(2): 117-216. Retrieved 19 Jun. 2013, from doi:10.1515/jpme.1987.15.2.128