Neuman, W. Lawrence. <br/><br/>
Social research methods :  qualitative and quantitative approaches / 
W. Lawrence Neuman. 
 - 6th  ed. 
 - Boston :  Pearson,  2011. 
 - viii, 592  p. 
<br/><br/><label>ISBN: </label>0205465315 : 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sociology--Research--Methodology.<br/>Social sciences--Research methodology.