Echeminada, P. (1997). Valdez on Charter change: Joke only. Philippine Star.
Cita Chicago (17th ed.)Echeminada, Perseus. "Valdez on Charter Change: Joke Only." Philippine Star 1997.
Cita MLA (9th ed.)Echeminada, Perseus. "Valdez on Charter Change: Joke Only." Philippine Star, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.