Olsen, Wendy. <br/><br/>
Data collection :  key debates & methods in social research / 
Wendy Olsen. 
 - 1st ed. 
 - Thousand Oaks, CA :  SAGE Publications,  2011. 
 - xi, 234 p. :  24 cm. 
<br/><br/><label>ISBN: </label>9781847872562 (pbk.) 
<br/><br/><label>LCCN: </label>2011921429 
<br/><br/><label>Dewey Class. No.: </label>300.72  / OLS