Calica, A. (2010). Poll: Noynoy maintains 15-16% lead over Erap. Philippine Star.
Cita Chicago Style (17a ed.)Calica, Aurea. "Poll: Noynoy Maintains 15-16% Lead over Erap." Philippine Star 2010.
Cita MLA (9a ed.)Calica, Aurea. "Poll: Noynoy Maintains 15-16% Lead over Erap." Philippine Star, 2010.
Precaución: Estas citas no son 100% exactas.