Huntsberger, David V. Croft, D James. Billingsley, Patrick. <br/><br/>
Statistical inference for management and economics. 

 - 2d ed. 
 - Boston :  Allyn and Bacon,  1980. 
 - xiv, 700 p. 
<br/><br/><label>ISBN: </label>0205068030 : 
<br/><br/><label>Dewey Class. No.: </label>519.54  / HUM