SNEDECOR,George.W and COCHRAN,William.G. (1956). STATISTICAL METHODS (5.). LOWA STATE UNIVERSITY PRESS.
Dyfyniad Arddull ChicagoSNEDECOR,George.W and COCHRAN,William.G. STATISTICAL METHODS. 5. USA: LOWA STATE UNIVERSITY PRESS, 1956.
Dyfyniad MLASNEDECOR,George.W and COCHRAN,William.G. STATISTICAL METHODS. 5. LOWA STATE UNIVERSITY PRESS, 1956.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.