Cite
MLA (8th Edition)
Voelker, David C.. Quality of Water From Public-Supply Wells In Principal Aquifers of Illinois, 1984-87. U.S. Geological Survey, 1989.
APA (7th Edition)
Voelker, D. C. (1989). Quality of water from public-supply wells in principal aquifers of Illinois, 1984-87. U.S. Geological Survey.
Chicago (17th Edition)
Voelker, David C. Quality of Water from Public-Supply Wells in Principal Aquifers of Illinois, 1984-87. Urbana, Illinois: U.S. Geological Survey, 1989.