Creswell, John W. <br/><br/>
Research design   : qualitative, quantitative, and mixed methods approaches  
/ John W.Creswell..., Jean david Creswell... 
. - 5ème éd 
. - London   : SAGE, 2018
. - XXV-275 p.  ; 25 cm 
<br/><br/>Bibliogr.Index 
<br/><br/><label>ISBN: </label>9781506386768 :59.01 euros  
<br/><br/><label>Source: </label>don  
<br/><br/><label>Universal Decimal Class. No.: </label>167