The psychology of helping and altruism  problems and puzzles 
David A. Schroeder ... et al. 
 - New York  McGraw-Hill  1995 
 - 334 p. : ill. ; 24 cm. 
<br/><br/>p. 289-321. 
<br/><br/><label>ISBN: </label>0070556113  RM49.11 
<br/><br/><label>LCCN: </label>94-23437 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Altruism<br/>Helping behavior