Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.

APA Citation Edition Citation

Willoughby, C. C. (1916). The art of the great earthwork builders of Ohio. - Washington, D.C.

Chicago Citation Edition Citation

Willoughby, Charles Clark. The Art of the Great Earthwork Builders of Ohio. - Washington, D.C. 1916.

MLA Citation Edition Citation

Willoughby, Charles Clark. The Art of the Great Earthwork Builders of Ohio. - Washington, D.C. 1916.