Using econometrics :  A practical guide / 
stundnmund A.H. 
 - 5th ed. 
 - Boston:  Person/Addison wesley ,  2006. 
 - xv,639 p,: 
<br/><br/><label>ISBN: </label>0321316495 
<br/><br/><label>LC Class. No.: </label>HB139  / .S55 2006