@book{479830,
	author = {Stern, Elliot. and Sage eBooks},
	title = {Evaluation research methods},
	publisher = {SAGE,},
	year = {2005.},
	series = {SAGE benchmarks in social research methods},
	address = {London :},
	url = {http://ezproxy.alfaisal.edu/login?url=http://sk.sagepub.com/navigator/evaluation-research-methods}
}