Robles, R. E. (2006). In 1971 and 2006, new charters designed to keep embattled presidents in power. Philippine Star.
Chicago-referens (17:e uppl.)Robles, Raissa Espinosa. "In 1971 and 2006, New Charters Designed to Keep Embattled Presidents in Power." Philippine Star 2006.
MLA-referens (9:e uppl.)Robles, Raissa Espinosa. "In 1971 and 2006, New Charters Designed to Keep Embattled Presidents in Power." Philippine Star, 2006.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.