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Dyfyniad Arddull ChicagoSpiegel, Murray R. Schaum`s Outline Theory and Problems of Statistics: In SI Units. Nueva York: McGraw-Hill, 1981.
Dyfyniad MLASpiegel, Murray R. Schaum`s Outline Theory and Problems of Statistics: In SI Units. McGraw-Hill, 1981.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.