APA (7th ed.) Citation

American Geological Institute & Colorado Geological Survey. (1987). Bibliography and index of Colorado geology, 1983. Colorado Geological Survey, Dept. of Natural Resources.

Chicago Style (17th ed.) Citation

American Geological Institute and Colorado Geological Survey. Bibliography and Index of Colorado Geology, 1983. Denver, Colo.: Colorado Geological Survey, Dept. of Natural Resources, 1987.

MLA (9th ed.) Citation

American Geological Institute and Colorado Geological Survey. Bibliography and Index of Colorado Geology, 1983. Colorado Geological Survey, Dept. of Natural Resources, 1987.