Conceptual foundations of psychology. 

 - Lincoln (E.U.A.) :  University of Nebraska,  1976. 
 - 586 p. 
 - Current theory and research in motivation ;  23 .
<br/><br/><label>ISBN: </label>0803256248 
<br/><br/><label>Encabezamiento--Tema: </label><br/>Motivación (Psicología)--Congresos