Freund, J. E. (2004). Modern elementary statistics. Upper Saddle River, N.J: Pearson Prentice-Hall.
Dyfyniad Arddull ChicagoFreund, John E. Modern Elementary Statistics. Upper Saddle River, N.J: Pearson Prentice-Hall, 2004.
Dyfyniad MLAFreund, John E. Modern Elementary Statistics. Upper Saddle River, N.J: Pearson Prentice-Hall, 2004.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.