(1986). Methods in observational epidemiology / Jennifer L. Kelsey, W. Douglas Thompson, Alfred S. Evans.
Cita Chicago (17th ed.)Methods in Observational Epidemiology / Jennifer L. Kelsey, W. Douglas Thompson, Alfred S. Evans. 1986.
Cita MLA (9th ed.)Methods in Observational Epidemiology / Jennifer L. Kelsey, W. Douglas Thompson, Alfred S. Evans. 1986.
Atenció: Aquestes cites poden no estar 100% correctes.