Prostate-Specific Antigen (PSA Test): Questions & Answers (2017). National Cancer Institute Member Services.
Lua i Stíl Chicago (17ú heag.)Prostate-Specific Antigen (PSA Test): Questions & Answers (2017). National Cancer Institute Member Services.
Lua MLA (9ú heag.)Prostate-Specific Antigen (PSA Test): Questions & Answers (2017). National Cancer Institute Member Services.
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