Federer, W. T. (1967). Experimental design: Theory and application. Oxford &IBH.
Dyfyniad Arddull ChicagoFederer, Walter T. Experimental Design: Theory and Application. New Delhi: Oxford &IBH, 1967.
Dyfyniad MLAFederer, Walter T. Experimental Design: Theory and Application. Oxford &IBH, 1967.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.