@book{17458,
	author = {Patton, Michael Quinn. and Patton, Michael Quinn.},
	title = {Qualitative evaluation and research methods /},
	publisher = {Sage Publications,},
	year = {1990.},
	address = {Newbury Park, Calif. :},
	edition = {2nd ed.},
	note = {Rev. ed. of: Qualitative evaluation methods. c1980.},
	url = {http://www.loc.gov/catdir/enhancements/fy0658/89024244-d.html}
}