Citazione Stile APA (7a Edizione)
Kohn, A. (1999). Punished by rewards: The trouble with gold stars, incentive plans, a's, praise, and other bribes.
Citazione stile Chigago Style (17a edizione)
Kohn, Alfie. Punished by Rewards: The Trouble with Gold Stars, Incentive Plans, a's, Praise, and Other Bribes. 1999.
Citatione MLA (9a ed.)
Kohn, Alfie. Punished by Rewards: The Trouble with Gold Stars, Incentive Plans, a's, Praise, and Other Bribes. 1999.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.