(1997). O & M Philippines wins grand prix at London internaitonal awards. Manila Bulletin.
Chicago Style aipamena"O & M Philippines Wins Grand Prix at London Internaitonal Awards." Manila Bulletin 1997.
MLA aipamena"O & M Philippines Wins Grand Prix at London Internaitonal Awards." Manila Bulletin, 1997.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.