Não informado. (2010). British Journal of Obstetrics and Gynaecology. Blackwell Scientific Publications.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. British Journal of Obstetrics and Gynaecology. Oxford, Inglaterra: Blackwell Scientific Publications, 2010.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. British Journal of Obstetrics and Gynaecology. Blackwell Scientific Publications, 2010.
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