APA (7th ed.) Zitazioa

Land classification sub-province of Ifugao, province of Isabela.

Chicago Style (17th ed.) Zitazioa

Land Classification Sub-province of Ifugao, Province of Isabela. 1961.

MLA (9th ed.) Zitazioa

Land Classification Sub-province of Ifugao, Province of Isabela.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.