Babbie, Earl R. <br/><br/>
The practice of social research / 
Earl Babbie. 
 - Belmont, Ca.:  Wadsworth Publishing Co.,  1975. 
 - xiv, 511 p. :  ill. ;  25 cm. 
<br/><br/>Includes bibliographies and index. 
<br/><br/>
<br/><br/><label>ISBN: </label>0534003818 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social sciences--Research.<br/>Social sciences--Methodology.