@book{52604,
	author = {Yin, Robert K.},
	title = {Case study research :},
	publisher = {Sage Publications,},
	year = {c2009},
	series = {Applied social research methods},
	address = {Los Angeles, Calif. :},
	edition = {4th ed.},
	url = {http://www.loc.gov/catdir/toc/ecip0817/2008019313.html}
}