Zakaria , Z. A. (2001). Obstetric anal sphincter injury: Retrospective review of risk factors.
Citazione stile Chigago Style (17a edizione)Zakaria , Zahar Azuar. Obstetric Anal Sphincter Injury: Retrospective Review of Risk Factors. 2001.
Citatione MLA (9a ed.)Zakaria , Zahar Azuar. Obstetric Anal Sphincter Injury: Retrospective Review of Risk Factors. 2001.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.