TY  - BOOK
AU  - Lepper,Mark R
AU  - Greene,David
TI  - The hidden costs of reward: new perspectives on the psychology of human motivation 
SN  - 047026487X :
U1  - 159.4 
PY  - 1978///
CY  - New Jersey
PB  - Lawrence Erlbaum Associates
KW  - Reward (Psychology)
KW  - Addresses, essays, lectures
KW  - Motivation (Psychology)
N1  - Includes index
ER  -