@book{38798,
	author = {Goldstein, Noah J. and Cialdini, Robert B.},
	title = {Yes!  50 scientifically proven ways to be persuasive},
	publisher = {Free Press},
	year = {2008},
	address = {Nueva York (Estados Unidos)},
	url = {http://www.loc.gov/catdir/toc/ecip082/2007041917.html}
}