(1991). 1990=Nineteen hundred and ninety Power Development Program. Manila Chronicle.
Chicago Style aipamena"1990=Nineteen Hundred and Ninety Power Development Program." Manila Chronicle 1991.
MLA aipamena"1990=Nineteen Hundred and Ninety Power Development Program." Manila Chronicle, 1991.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.