Alfie Kohn, Punished by Rewards: The Trouble with Gold Stars, Incentive Plans, A's, Praise, and Other Bribes, 1999, Houghton Mifflin Co., NY p26
|
|
|
Alfie KohnAlfie Kohn, Punished by Rewards: The Trouble with Gold Stars, Incentive Plans, A's, Praise, and Other Bribes, 1999, Houghton Mifflin Co., NY p26
|