Vessey, M. P. (1970). Some epidemiological investigations into the safety of oral contraceptives. University of London.
Chicago-referens (17:e uppl.)Vessey, Martin P. Some Epidemiological Investigations into the Safety of Oral Contraceptives. University of London, 1970.
MLA-referens (8:e uppl.)Vessey, Martin P. Some Epidemiological Investigations into the Safety of Oral Contraceptives. University of London, 1970.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.