APA (7th ed.) Zitazioa

(1986). Methods in observational epidemiology / Jennifer L. Kelsey, W. Douglas Thompson, Alfred S. Evans.

Chicago Style (17th ed.) Zitazioa

Methods in Observational Epidemiology / Jennifer L. Kelsey, W. Douglas Thompson, Alfred S. Evans. 1986.

MLA (9th ed.) Zitazioa

Methods in Observational Epidemiology / Jennifer L. Kelsey, W. Douglas Thompson, Alfred S. Evans. 1986.

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