Calvey, David  <br/><br/>
Covert research :  the art, politics and ethics of undercover fieldwork 

 - London:  Sage Publications Ltd.,  2017. 
 - 234 p. 
<br/><br/><label>ISBN: </label>9781849203845 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Covert research<br/>Research<br/>Research methods
<br/><br/><label>Dewey Class. No.: </label>001.42 CAL