IEA. International Epidemiological Association: EpiBlog. 2012 [cited 2012 09/14]; Available from: "EpiBlog « IEA". Archived from the original on 22 September 2012. Retrieved 17 September 2012..
Miquel Porta, editor. Greenland S, Hernán M, dos Santos Silva I, Last JM, associate editors (2014). "A dictionary of epidemiology", 6th. edition. New York: Oxford University Press. [1]ISBN9780199976737
IEA. International Epidemiological Association: EpiBlog. 2012 [cited 2012 09/14]; Available from: "EpiBlog « IEA". Archived from the original on 22 September 2012. Retrieved 17 September 2012..