Cancer Clusters (2018). National Cancer Institute Member Services.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCancer Clusters (2018). National Cancer Institute Member Services.
एमएलए (9वां संस्करण) प्रशस्ति पत्रCancer Clusters (2018). National Cancer Institute Member Services.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.