Cita APA (7a ed.)
Hudson, T., Fox, F. D., & Plumlee, G. S. (1999). Metal mining and the environment. American Geological Institute.
Cita Chicago Style (17a ed.)
Hudson, Travis, Frederick D. Fox, y Geoffrey S. Plumlee. Metal Mining and the Environment. Alexandria, Va.: American Geological Institute, 1999.
Cita MLA (9a ed.)
Hudson, Travis, et al. Metal Mining and the Environment. American Geological Institute, 1999.
Precaución: Estas citas no son 100% exactas.