Porta, M. (2008). A dictonary of epidemiology (5th.). Oxford University.
Cita Chicago (17th ed.)Porta, Miquel. A Dictonary of Epidemiology. 5th. New York: Oxford University, 2008.
Cita MLA (8th ed.)Porta, Miquel. A Dictonary of Epidemiology. 5th. Oxford University, 2008.
Atenció: Aquestes cites poden no estar 100% correctes.