APA aipamena

Castro, E. R. (1990). Scientists study biomass. Manila Bulletin.

Chicago Style aipamena

Castro, Eddee RH. "Scientists Study Biomass." Manila Bulletin 1990.

MLA aipamena

Castro, Eddee RH. "Scientists Study Biomass." Manila Bulletin, 1990.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.