Babbie, Earl R. <br/><br/>
The practice of social research / 
Earl Babbie. 
 - 6th ed. 
 - Belmont, Ca. :  Wadsworth,  1992. 
 - xxii, 112 p. :  ill. 
<br/><br/><label>ISBN: </label>0534155766 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social sciences--Research<br/>Social sciences--Methodology.