Gordis, L. (2009). Epidemiology (4th ed.). Elsevier/Saunders.
Lua i Stíl Chicago (17ú heag.)Gordis, Leon. Epidemiology. 4th ed. Philadelphia: Elsevier/Saunders, 2009.
Lua MLA (8ú heag.)Gordis, Leon. Epidemiology. 4th ed. Elsevier/Saunders, 2009.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.