Oral Contraceptives & Cancer Risk: Questions & Answers (2018). National Cancer Institute Member Services.
Chicago-referens (17:e uppl.)Oral Contraceptives & Cancer Risk: Questions & Answers (2018). National Cancer Institute Member Services.
MLA-referens (9:e uppl.)Oral Contraceptives & Cancer Risk: Questions & Answers (2018). National Cancer Institute Member Services.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.