APA (7th ed.) Citation

Young, H. L., & Siegel, D. I. (1992). Hydrogeology of the Cambrian-Ordovician aquifer system in the Northern Midwest, United States. US Gov. Print. Off.

Chicago Style (17th ed.) Citation

Young, H. L., and D. I. Siegel. Hydrogeology of the Cambrian-Ordovician Aquifer System in the Northern Midwest, United States. Washington: US Gov. Print. Off, 1992.

MLA (9th ed.) Citation

Young, H. L., and D. I. Siegel. Hydrogeology of the Cambrian-Ordovician Aquifer System in the Northern Midwest, United States. US Gov. Print. Off, 1992.