Babbie, Earl R. <br/><br/>
Survey research methods / 
Earl Babbie. 
 - 2nd ed. 
 - Belmont, Ca. :  Wadsworth Publishing Co.,  1990. 
 - xx, 395 p. :  ill. ;  24 cm. 
<br/><br/> Includes index. 
<br/><br/>Bibliography : p. 382-387. 
<br/><br/><label>ISBN: </label>0534126723 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social sciences--Research.<br/>Social surveys.