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Dyfyniad Arddull ChicagoWaller, Lance. Applied Sapital Statistics for Public Heath Data. New Jersey: Wiley & Sons, 2004.
Dyfyniad MLAWaller, Lance. Applied Sapital Statistics for Public Heath Data. Wiley & Sons, 2004.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.