@inbook {31494,
	title = {Beyond positive feedback: The effects of competence support on autonomous motivation and adjustment in physical education},
	booktitle = {Physical education research: What{\textquoteright}s the evidence?},
	year = {2008},
	publisher = {Acco},
	organization = {Acco},
	isbn = {903346893X},
	author = {Mouratidis, T and Vansteenkiste, Maarten and Lens, Willy}
}
