APA aipamena

Paul, C., Skegg, D. C., & Spears, G. F. (1989). Depot medroxyprogesterone (Depo-Provera) and risk of breast cancer.

Chicago Style aipamena

Paul, C., D. C. Skegg, and G. F. Spears. Depot Medroxyprogesterone (Depo-Provera) and Risk of Breast Cancer. 1989.

MLA aipamena

Paul, C., D. C. Skegg, and G. F. Spears. Depot Medroxyprogesterone (Depo-Provera) and Risk of Breast Cancer. 1989.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.