Vessey, M. P. (1970). Some epidemiological investigations into the safety of oral contraceptives. University of London.
Lua i Stíl Chicago (17ú heag.)Vessey, Martin P. Some Epidemiological Investigations into the Safety of Oral Contraceptives. University of London, 1970.
Lua MLA (8ú heag.)Vessey, Martin P. Some Epidemiological Investigations into the Safety of Oral Contraceptives. University of London, 1970.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.