Não informado. (2010). British Journal of Obstetrics and Gynaecology. Blackwell Scientific Publications.
Chicago (17e ed.) BronvermeldingNão informado. British Journal of Obstetrics and Gynaecology. Oxford, Inglaterra: Blackwell Scientific Publications, 2010.
MLA (8e ed.) BronvermeldingNão informado. British Journal of Obstetrics and Gynaecology. Blackwell Scientific Publications, 2010.
Let op: Deze citaties zijn niet altijd 100% accuraat.