Prepared by The Presedential Management Staff. (1997). The Philippines today: Pole vaulting into the 21st century. [s.n.].
Chicago Style aipamenaPrepared by The Presedential Management Staff. The Philippines Today: Pole Vaulting into the 21st Century. [s.l.]: [s.n.], 1997.
MLA aipamenaPrepared by The Presedential Management Staff. The Philippines Today: Pole Vaulting into the 21st Century. [s.n.], 1997.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.