Bailey, Kenneth. D  <br/><br/>
Methods of Social Research 

 - 4th ed. 
 - Islamabad:  National Book Foundation,  n.d 
 - 523 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sociology- Research Methods
<br/><br/><label>Dewey Class. No.: </label>301.072  / BAM