Santos, J. (2025). 50% copper tariff could speed up PH shift to value-added production. Manila Bulletin.
Chicago Style aipamenaSantos, Jel. "50% Copper Tariff Could Speed Up PH Shift to Value-added Production." Manila Bulletin 2025.
MLA aipamenaSantos, Jel. "50% Copper Tariff Could Speed Up PH Shift to Value-added Production." Manila Bulletin, 2025.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.