APA (7th ed.) Citation

Berg, R. C., & Greenpool, M. R. (1993). Stack-unit geologic mapping: Color-coded and computer-based methodology. [Dept. of Energy and Natural Resources], Illinois State Geological Survey.

Chicago Style (17th ed.) Citation

Berg, Richard C., and Mary R. Greenpool. Stack-unit Geologic Mapping: Color-coded and Computer-based Methodology. Champaign, Ill.: [Dept. of Energy and Natural Resources], Illinois State Geological Survey, 1993.

MLA (9th ed.) Citation

Berg, Richard C., and Mary R. Greenpool. Stack-unit Geologic Mapping: Color-coded and Computer-based Methodology. [Dept. of Energy and Natural Resources], Illinois State Geological Survey, 1993.