(1999). New thrusts in the Year 2000 and beyond. Philippine Star.
Chicago Style aipamena"New Thrusts in the Year 2000 and Beyond." Philippine Star 1999.
MLA aipamena"New Thrusts in the Year 2000 and Beyond." Philippine Star, 1999.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.