Prostate-Specific Antigen (PSA Test): Questions & Answers (2017). National Cancer Institute Member Services.
芝加哥风格引文Prostate-Specific Antigen (PSA Test): Questions & Answers (2017). National Cancer Institute Member Services.
MLA引文Prostate-Specific Antigen (PSA Test): Questions & Answers (2017). National Cancer Institute Member Services.
警告：这些引文格式不一定是100％准确.