@book{224540,
	author = {Poon, Leonard W.,},
	title = {Understanding Well-Being in the Oldest Old /},
	publisher = {Cambridge University Press,},
	year = {2011.},
	address = {Cambridge :},
	note = {Title from publisher's bibliographic system (viewed on 09 Oct 2015).},
	url = {http://dx.doi.org/10.1017/CBO9780511920974}
}