@book{99940,
	author = {Hefferon, Kate. and Boniwell, Ilona. and ebrary, Inc.},
	title = {Positive psychology},
	publisher = {Open University Press/McGraw-Hill,},
	year = {2011.},
	address = {Maidenhead, Berkshire ;},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10604359}
}