Sage handbook of mixed method in social & behavioral research/ 
Edited by Abbas tashakkori and CHarles Teddlie 
 - 2nd 
 - Los Angels .:  Sage.;  2010 
 - xv,893p.:  ill.;  28 cm. 
<br/><br/> includes index 
<br/><br/><label>ISBN: </label>9781412972666 
<br/><br/><label>LC Class. No.: </label>DUCE H62.T244