APA Edition Citation

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

Chicago Edition Citation

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

MLA Edition Citation

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

Advarsel: Disse citationer er muligvist ikke 100% nøjagtige.