@book {20130,
	title = {Macroeconomics: A Modern Approach},
	year = {2008},
	publisher = {Thomson/Southwestern},
	organization = {Thomson/Southwestern},
	url = {http://www.amazon.com/Macroeconomics-Approach-Robert-J-Barro/dp/0324178107},
	author = {Robert Barro}
}
