APA aipamena

(2000). Earth and its resources. New York: Macmillan/Mcgraw-Hill School.

Chicago Style aipamena

Earth and Its Resources. New York: Macmillan/Mcgraw-Hill School, 2000.

MLA aipamena

Earth and Its Resources. New York: Macmillan/Mcgraw-Hill School, 2000.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.