Heckhausen, Heinz. <br/><br/>
Motivation and action / 
Heinz Heckhausen ; translator, Peter K. Leppmann. 
 - Berlin :  Springer-Verlag,  1991. 
 - 504 pages :  illustration ;  28 cm. 
<br/><br/><label>ISBN: </label>3540542043 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Motivation (Psychology).