@book{31231,
	author = {Bausell, R. Barker, and Li, Yu-Fang, and ebrary, Inc.},
	title = {Power analysis for experimental research},
	publisher = {Cambridge University Press,},
	year = {2002.},
	address = {Cambridge ;},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10070352}
}