Babbie, Earl R. <br/><br/>
The practice of social research / 
Earl Babbie. 
 - 6th ed. 
 - Belmont, Ca.:  Wadsworth Publishing Co.,  1992. 
 - 1 v. (various pagings) :  ill. ;  26 cm. 
<br/><br/>
<br/><br/><label>ISBN: </label>0534155766 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social sciences--Research.<br/>Social sciences--Methodology.