Cita APA (7th ed.)

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.