APA (7th ed.) Citation

Finkelman, R. B., & Lovern, V. S. (2001). The World Coal Quality Inventory (WoCQI) (Online version 1.0.). U.S. Dept. of the Interior, U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Finkelman, Robert B., and Vivian S. Lovern. The World Coal Quality Inventory (WoCQI). Online version 1.0. [Reston, Va.]: U.S. Dept. of the Interior, U.S. Geological Survey, 2001.

MLA (9th ed.) Citation

Finkelman, Robert B., and Vivian S. Lovern. The World Coal Quality Inventory (WoCQI). Online version 1.0. U.S. Dept. of the Interior, U.S. Geological Survey, 2001.