Beral, V., & Reeves, G. (1998). Breast cancer and combined oral contraceptives: Results from the Collaborative Group on Hormonal Factors in Breast Cancer.
Chicago-referens (17:e uppl.)Beral, V., och G. Reeves. Breast Cancer and Combined Oral Contraceptives: Results from the Collaborative Group on Hormonal Factors in Breast Cancer. 1998.
MLA-referens (9:e uppl.)Beral, V., och G. Reeves. Breast Cancer and Combined Oral Contraceptives: Results from the Collaborative Group on Hormonal Factors in Breast Cancer. 1998.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.