Cancer Clusters (2018). National Cancer Institute Member Services.
Lua i Stíl Chicago (17ú heag.)Cancer Clusters (2018). National Cancer Institute Member Services.
Lua MLA (9ú heag.)Cancer Clusters (2018). National Cancer Institute Member Services.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.