Não informado. (1961). Journal of Obstetrics and Gynaecology of the British Commonwealth. Royal College of Obstetricians and Gynaecologists.
Chicago-referens (17:e uppl.)Não informado. Journal of Obstetrics and Gynaecology of the British Commonwealth. London: Royal College of Obstetricians and Gynaecologists, 1961.
MLA-referens (8:e uppl.)Não informado. Journal of Obstetrics and Gynaecology of the British Commonwealth. Royal College of Obstetricians and Gynaecologists, 1961.
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