Lua APA (7ú heag.)

Kelsey, J. L. W. (1996). Methods in observational epidemiology (2nd.). Oxford University Press.

Lua i Stíl Chicago (17ú heag.)

Kelsey, Jennifer L. Whittemore. Methods in Observational Epidemiology. 2nd. New York: Oxford University Press, 1996.

Lua MLA (8ú heag.)

Kelsey, Jennifer L. Whittemore. Methods in Observational Epidemiology. 2nd. Oxford University Press, 1996.

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