Koepsell, T. D., & Thomas D. Koepsell; Noel S. Weiss. (2003). Epidemiologic methods: Studying the occurrence of illness. Oxford,New York: Oxford University Press.
Dyfyniad Arddull ChicagoKoepsell, Thomas D., và Thomas D. Koepsell; Noel S. Weiss. Epidemiologic Methods: Studying the Occurrence of Illness. Oxford,New York: Oxford University Press, 2003.
Dyfyniad MLAKoepsell, Thomas D., và Thomas D. Koepsell; Noel S. Weiss. Epidemiologic Methods: Studying the Occurrence of Illness. Oxford,New York: Oxford University Press, 2003.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.