"Guidelines for the preparation of manuscripts" Journal of Perinatal Medicine - Official Journal of the WAPM, 16.1 (2009): 77-80. Retrieved 20 May. 2013, from doi:10.1515/jpme.1988.16.1.77

Guidelines for the preparation of manuscripts. Journal of Perinatal Medicine - Official Journal of the WAPM (2009), 16(1), pp. 5-80. Retrieved 20 May. 2013, from doi:10.1515/jpme.1988.16.1.77

Guidelines for the preparation of manuscripts. Journal of Perinatal Medicine - Official Journal of the WAPM. 2009. 16(1): 5-80. Retrieved 20 May. 2013, from doi:10.1515/jpme.1988.16.1.77