Snyder, C R et. al. <br/><br/>
Positive psychology 

 - 2 
 - New Delhi  Sage Publishing  2011 
 - xxvi, 588p. 
<br/><br/><label>ISBN: </label>9788132107507 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Positive congnitive states, processes<br/>Positive Psychology