APA (7th ed.) Citation

Powell, L. R., & Yarbrough, R. E. (1990). Analysis of level survey data over mine subsidence events in Illinois, USA: Abandoned and active mines. Illinois Mine Subsidence Research Program, Illinois State Geological Survey.

Chicago Style (17th ed.) Citation

Powell, Larry R., and Ronald E. Yarbrough. Analysis of Level Survey Data over Mine Subsidence Events in Illinois, USA: Abandoned and Active Mines. Champaign, Ill.: Illinois Mine Subsidence Research Program, Illinois State Geological Survey, 1990.

MLA (9th ed.) Citation

Powell, Larry R., and Ronald E. Yarbrough. Analysis of Level Survey Data over Mine Subsidence Events in Illinois, USA: Abandoned and Active Mines. Illinois Mine Subsidence Research Program, Illinois State Geological Survey, 1990.