APA aipamena

Villegas, B. M. (2001). Effecitve ways of helping the poor. Manila Bulletin.

Chicago Style aipamena

Villegas, Bernardo M. "Effecitve Ways of Helping the Poor." Manila Bulletin 2001.

MLA aipamena

Villegas, Bernardo M. "Effecitve Ways of Helping the Poor." Manila Bulletin, 2001.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.