Zakaria , Z. A. (2001). Obstetric anal sphincter injury: Retrospective review of risk factors.
Čikaški stil citiranja (17. izdanje)Zakaria , Zahar Azuar. Obstetric Anal Sphincter Injury: Retrospective Review of Risk Factors. 2001.
MLA način citiranja (9. izdanje)Zakaria , Zahar Azuar. Obstetric Anal Sphincter Injury: Retrospective Review of Risk Factors. 2001.
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