APA-referens (7:e uppl.)

Werner, A. B. T., Sinclair, W. D., & Amey, E. B. (1998). International strategic mineral issues summary report--tungsten. U.S. G.P.O. U.S. Dept. of the Interior, U.S. Geological Survey.

Chicago-referens (17:e uppl.)

Werner, Antony B. T., W. D. Sinclair, och Earle B. Amey. International Strategic Mineral Issues Summary Report--tungsten. Washington: U.S. G.P.O. U.S. Dept. of the Interior, U.S. Geological Survey, 1998.

MLA-referens (9:e uppl.)

Werner, Antony B. T., et al. International Strategic Mineral Issues Summary Report--tungsten. U.S. G.P.O. U.S. Dept. of the Interior, U.S. Geological Survey, 1998.