APA aipamena

Dunbar, C. O. Historical geology.3rd ed (Ed. 3.).

Chicago Style aipamena

Dunbar, Carl O. Historical Geology.3rd Ed. Ed. 3.

MLA aipamena

Dunbar, Carl O. Historical Geology.3rd Ed. Ed. 3.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.