@book{2894,
	author = {Adler, Patricia A. and Adler, Peter,},
	title = {Membership roles in field research /},
	publisher = {Sage Publications,},
	year = {c1987.},
	address = {Newbury Park, Calif. :},
	url = {http://www.loc.gov/catdir/enhancements/fy0654/87042732-d.html}
}