Kathryn <br/><br/>
It always seems impossible untill it's done / 
Kathryn & Ross Petras 
 - New York  Workman Publishing Company  2014 
 - 390 pages  15cm 
<br/><br/><label>ISBN: </label>9780761179887 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Motivation (Psychology)