APA (7th ed.) Citation

Duwelius, R. F., Kay, R. T., & Prinos, S. T. (1996). Ground-water quality in the Calumet Region of northwestern Indiana and northeastern Illinois, June 1993. U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Duwelius, Richard F., Robert T. Kay, and Scott T. Prinos. Ground-water Quality in the Calumet Region of Northwestern Indiana and Northeastern Illinois, June 1993. Indianapolis, Indiana ; Urbana, Illinois: U.S. Geological Survey, 1996.

MLA (9th ed.) Citation

Duwelius, Richard F., et al. Ground-water Quality in the Calumet Region of Northwestern Indiana and Northeastern Illinois, June 1993. U.S. Geological Survey, 1996.