Dyfyniad APA

Oral Contraceptives & Cancer Risk: Questions & Answers (2018). National Cancer Institute Member Services.

Dyfyniad Arddull Chicago

Oral Contraceptives & Cancer Risk: Questions & Answers (2018). National Cancer Institute Member Services.

Dyfyniad MLA

Oral Contraceptives & Cancer Risk: Questions & Answers (2018). National Cancer Institute Member Services.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.