APA (7th ed.) Citation

Klett, T. R., & Charpentier, R. R. (2003). FORSPAN model users guide (Version 1.0.). U.S. Dept. of the Interior, U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Klett, T. R., and Ronald R. Charpentier. FORSPAN Model Users Guide. Version 1.0. Denver, Colo.: U.S. Dept. of the Interior, U.S. Geological Survey, 2003.

MLA (9th ed.) Citation

Klett, T. R., and Ronald R. Charpentier. FORSPAN Model Users Guide. Version 1.0. U.S. Dept. of the Interior, U.S. Geological Survey, 2003.