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Dyfyniad Arddull ChicagoWang, jung - Der. Basic Principles and Practical Applications in Epidemiological Research. Singapore: World Scientific Publishing, 2002.
Dyfyniad MLAWang, jung - Der. Basic Principles and Practical Applications in Epidemiological Research. World Scientific Publishing, 2002.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.