@book{50091,
	author = {Layder, Derek.},
	title = {Understanding social theory /},
	publisher = {Sage,},
	year = {1994.},
	address = {London :},
	edition = {2nd ed.},
	note = {Includes index.},
	url = {http://www.loc.gov/catdir/enhancements/fy0656/93086895-d.html}
}