APA aipamena

(1997). Preserving the country's water resources. IN Editorial [column]. Manila Bulletin.

Chicago Style aipamena

"Preserving the Country's Water Resources. IN Editorial [column]." Manila Bulletin 1997.

MLA aipamena

"Preserving the Country's Water Resources. IN Editorial [column]." Manila Bulletin, 1997.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.