Guerrero, R. D. I. (1992). A marine phenomenon called red tide / Rafael D. III Guerrero. Manila Bulletin.
Chicago Style aipamenaGuerrero, Rafael D. III. "A Marine Phenomenon Called Red Tide / Rafael D. III Guerrero." Manila Bulletin 1992.
MLA aipamenaGuerrero, Rafael D. III. "A Marine Phenomenon Called Red Tide / Rafael D. III Guerrero." Manila Bulletin, 1992.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.