Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.