Bryman, Alan <br/><br/>
Social research methods 

 - 4th. 
 - Oxford  Oxford University Press          2012 
 - xli,766p.  includes bibliographical references and index 
<br/><br/><label>ISBN: </label>9780198738015 
<br/><br/><label>Source: </label> Textbook 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Commerce