@inbook {31508,
	title = {Group development in the physical education class},
	booktitle = {Psychology for physical educators},
	year = {2007},
	pages = {101-119},
	publisher = {Human Kinetics},
	organization = {Human Kinetics},
	edition = {2nd},
	address = {Champaign, IL},
	author = {Hovelynck, Johan and Vanden Auweele, Yves and Mouratidis, A.},
	editor = {Liukkonen, J. and Vanden Auweele, Yves and Vereijken, B and Alfermann, D and Theodorakis, Y.}
}
