Shipman, M. K.; Boniface, D. R.; Tefft, M. E.; McCloghry, F. (July 1997). "Antenatal perineal massage and subsequent perineal outcomes: a randomised controlled trial". British Journal of Obstetrics and Gynaecology. 104 (7): 787–91. doi:10.1111/j.1471-0528.1997.tb12021.x. PMID9236642. S2CID33507861.
Shipman, M. K.; Boniface, D. R.; Tefft, M. E.; McCloghry, F. (July 1997). "Antenatal perineal massage and subsequent perineal outcomes: a randomised controlled trial". British Journal of Obstetrics and Gynaecology. 104 (7): 787–91. doi:10.1111/j.1471-0528.1997.tb12021.x. PMID9236642. S2CID33507861.
Shipman, M. K.; Boniface, D. R.; Tefft, M. E.; McCloghry, F. (July 1997). "Antenatal perineal massage and subsequent perineal outcomes: a randomised controlled trial". British Journal of Obstetrics and Gynaecology. 104 (7): 787–91. doi:10.1111/j.1471-0528.1997.tb12021.x. PMID9236642. S2CID33507861.