Philippine centennial. s.n.
Chicago Style aipamenaPhilippine Centennial. [s.l: s.n.
MLA aipamenaPhilippine Centennial. s.n.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.
Philippine centennial. s.n.
Chicago Style aipamenaPhilippine Centennial. [s.l: s.n.
MLA aipamenaPhilippine Centennial. s.n.