SILMAN, A. J. (1995). Epidemiological studies: A practical guide. Cambridge University Press.
Lua i Stíl Chicago (17ú heag.)SILMAN, Alan J. Epidemiological Studies: A Practical Guide. Cambridge: Cambridge University Press, 1995.
Lua MLA (9ú heag.)SILMAN, Alan J. Epidemiological Studies: A Practical Guide. Cambridge University Press, 1995.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.