(2000). Regionwide survillance key to winning battle vs poliongelitis. Manila Times.
Chicago Style (17th ed.) Zitazioa"Regionwide Survillance Key to Winning Battle Vs Poliongelitis." Manila Times 2000.
MLA (9th ed.) Zitazioa"Regionwide Survillance Key to Winning Battle Vs Poliongelitis." Manila Times, 2000.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.