APA (7th ed.) Citation

Bergstrom, R. E. (1956). Groundwater geology in western Illinois, north part, a preliminary geologic report. [publisher not identified].

Chicago Style (17th ed.) Citation

Bergstrom, Robert Edward. Groundwater Geology in Western Illinois, North Part, a Preliminary Geologic Report. Urbana: [publisher not identified], 1956.

MLA (9th ed.) Citation

Bergstrom, Robert Edward. Groundwater Geology in Western Illinois, North Part, a Preliminary Geologic Report. [publisher not identified], 1956.