Villanueva, M. A. (2001). Naturalization bill signed. Philippine Star.
Chicago Style aipamenaVillanueva, Marichu A. "Naturalization Bill Signed." Philippine Star 2001.
MLA aipamenaVillanueva, Marichu A. "Naturalization Bill Signed." Philippine Star, 2001.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.