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

APA Citation Edition Citation

Ries, H. (1903). The clays of the United States east of the Mississippi river. Govt. print. off..

Chicago Citation Edition Citation

Ries, Heinrich. The Clays of the United States East of the Mississippi River. Washington, D.C.: Govt. print. off., 1903.

MLA Citation Edition Citation

Ries, Heinrich. The Clays of the United States East of the Mississippi River. Govt. print. off., 1903.