@book{137,
	author = {Heshmat, Shahram.},
	title = {An overview of managerial economics in the health care system },
	publisher = {Delmar Thomson Learning,},
	year = {2001.},
	address = {New York :},
	url = {http://www.amazon.com/Overview-Managerial-Economics-Services-Administration/dp/0766815285}
}