APA (7th ed.) Citation

Geological Survey (U.S.), Kolm, K. E., & Langer, W. H. (2000). Hierarchical systems analysis in karst terrains (Version 1.0.). The Survey : For sale by the USGS Information Systems (Open-File Report Sales).

Chicago Style (17th ed.) Citation

Geological Survey (U.S.), Kenneth E. Kolm, and William H. Langer. Hierarchical Systems Analysis in Karst Terrains. Version 1.0. Denver, Colo.: The Survey : For sale by the USGS Information Systems (Open-File Report Sales), 2000.

MLA (9th ed.) Citation

Geological Survey (U.S.), et al. Hierarchical Systems Analysis in Karst Terrains. Version 1.0. The Survey : For sale by the USGS Information Systems (Open-File Report Sales), 2000.