Maddala, G. S. <br/><br/>
Introduction to econometrics / 

 - 3rd ed. 
 - Singapore :  John Wiley and sons ,  2001. 
 - xxii+636 
<br/><br/><label>ISBN: </label>9971513838 
<br/><br/><label>Subjects--Index Terms: </label>Econometrics