@book{1022,
	author = {Punch, Keith,},
	title = {Introduction to social research},
	publisher = {SAGE,},
	year = {2014.},
	address = {Los Angeles :},
	edition = {Third edition.},
	url = {http://www.vlebooks.com/vleweb/product/openreader?id=none&isbn=9781446296165}
}