The sage qualitataive research Kit/  managing quality in qualitative research 
Flick,Uwe [ed.] 
 - Los angeles:  Sage publication,  2007. 
 - 156 
<br/><br/><label>ISBN: </label>9780761949824 
<br/><br/><label>Dewey Class. No.: </label>001.42  / FLI/M