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Dyfyniad Arddull ChicagoKendall,Maurice. Rank Correlation Methods. 4. London: Charles Griffin, 1975.
Dyfyniad MLAKendall,Maurice. Rank Correlation Methods. 4. Charles Griffin, 1975.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.