APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (8th ed.) Citation

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