@book{7130,
	author = {Creswell, John W.},
	title = {Research design: qualitative, quantitative, and mixed method approaches },
	publisher = {Sage Publications,},
	year = {c2003.},
	address = {Thousand Oaks, Calif. :},
	edition = {2nd ed.},
	url = {http://www.loc.gov/catdir/enhancements/fy0658/2002005575-t.html}
}