Fredrickson, Barbara L. <br/><br/>
Positivity: discover the upward spiral that will change your life 
by Barbara L. Fredrickson 
 - New York  Harmony Books  2009 
 - 277p. 
<br/><br/><label>ISBN: </label>9780307393746 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Positive psychology
<br/><br/><label>Dewey Class. No.: </label>K95 F872