Books
Berkow, R. et al. (eds). 1997. The Merck Manual of Medical Information. Merck Research Laboratories, New York.
Rothman, K. J. 2002. Epidemiology: An Introduction. Oxford University Press, Oxford.
Hunink, M. G. M. et al. 2001. Decision making in health and medicine. Integrating evidence and values. Cambridge University Press, Cambridge.