Here a couple citations for you....

Works Cited

Moen, Martin. "Practical Ethics." Practical Ethics. 22 Sept. 2012. Web. 5 Feb. 2015.

            <http://blog.practicalethics.ox.ac.uk/2012/09/dont-give-money-to-beggars/>.

Reich, Rob. "Not Very Giving." The New York Times. The New York Times, 4 Sept. 2013. Web.
          5 Feb. 2015.<http://www.nytimes.com/2013/09/05/opinion/not-very-giving.html?     
         _r=0>.