@book{89140,
	author = {Guzzini, Stefano.},
	title = {Constructivism and international relations  Alexander Wendt and his critics},
	publisher = {Routledge},
	year = {2006},
	series = {The new international relations},
	address = {Nueva York (Estados Unidos)},
	url = {http://www.loc.gov/catdir/toc/ecip0512/2005014086.html}
}