@book{481377,
	author = {Midgley, Gerald. and Sage eBooks},
	title = {Systems thinking},
	publisher = {SAGE,},
	year = {2003.},
	series = {SAGE library in business and management},
	address = {London :},
	url = {http://ezproxy.alfaisal.edu/login?url=http://sk.sagepub.com/navigator/systems-thinking}
}