Marshall, Catherine <br/><br/>
Designing qualitative research 
Catherine Marshall, Gretchen B. Rossman. 
 - 3rd  ed. 
 - New Delhi  Sage Publications  1999 
 - xvi, 224p., 22cm. 
<br/><br/><label>ISBN: </label>0-7619-1340-8. 
<br/><br/><label>Dewey Class. No.: </label>300.72  / M36D