Research at grass roots :  for the social sciences and human services professions / 
A.S. de Vos ... [et al.]. 
 - 4th ed. 
 - Pretoria :  Van Schaik,  2011. 
 - xv, 547 p. :  ill. ;  25 cm. 
<br/><br/>Includes bibliographical references (p. 514-537) and index. 
<br/><br/><label>ISBN: </label>9780627027727 0627027725 
<br/><br/><label>LCCN: </label>2011466179 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social service--Research--Methodology.<br/>Social sciences--Research--Methodology.<br/>Human services--Research--Methodology.
<br/><br/><label>LC Class. No.: </label>H 62  / VOS 2008