Prostate-Specific Antigen (PSA Test): Questions & Answers (2017). National Cancer Institute Member Services.
Čikaški stil citiranja (17. izdanje)Prostate-Specific Antigen (PSA Test): Questions & Answers (2017). National Cancer Institute Member Services.
MLA način citiranja (9. izdanje)Prostate-Specific Antigen (PSA Test): Questions & Answers (2017). National Cancer Institute Member Services.
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