APA (7e ed.) Bronvermelding

Stauffer, C. R., & Thiel, G. A. (1941). The Paleozoic and related rocks of southeastern Minnesota. The University of Minnesota press.

Chicago (17e ed.) Bronvermelding

Stauffer, Clinton R., en George A. Thiel. The Paleozoic and Related Rocks of Southeastern Minnesota. Minneapolis: The University of Minnesota press, 1941.

MLA (9e ed.) Bronvermelding

Stauffer, Clinton R., en George A. Thiel. The Paleozoic and Related Rocks of Southeastern Minnesota. The University of Minnesota press, 1941.