APA (7th ed.) Citation

Du Bois, E. P., & Bays, C. A. (1945). I. Subsurface relations of the Maquoketa and "Trenton" formations in Illinois. [publisher not identified].

Chicago Style (17th ed.) Citation

Du Bois, Ernest Paul, and Carl Andrew Bays. I. Subsurface Relations of the Maquoketa and "Trenton" Formations in Illinois. Urbana, Illinois: [publisher not identified], 1945.

MLA (9th ed.) Citation

Du Bois, Ernest Paul, and Carl Andrew Bays. I. Subsurface Relations of the Maquoketa and "Trenton" Formations in Illinois. [publisher not identified], 1945.