@book{8098,
	author = {Kohn, Alfie.},
	title = {Punished by rewards : the trouble with gold stars, incentive plans, A?s, praise, and other bribes / Alfie Kohn ; with a new afterword by the author.},
	publisher = {Boston : Houghton Mifflin Co., 1993.},
	address = {Boston : Houghton Mifflin Co., 1993.}
}