Problemas de salud
Jihan Khalaf
"Statistics by Area - Immunization." Childinfo.org: Statistics by Area - Immunization - Current Status. N.p., n.d. Web. 16 Apr. 2014. <http://www.childinfo.org/immunization_status.html>.
"PHOTOS: Angelina Jolie Reaches Out to African Refugees." PEOPLE.com. N.p., 14 Sept. 2009. Web. 16 Apr. 2014. <http://www.people.com/people/article/0%2C%2C20304302%2C00.html>.
"Club News." Bill Gates – Nigeria Advances the Fight against Polio. N.p., n.d. Web. 16 Apr. 2014. <http://ryderotary.org.au/_blog/News/post/Bill_Gates_%E2%80%93_Nigeria_advances_the_fight_against_polio/>