Cita APA (7th ed.)
Tysdal, R. G., & Berg, R. B. (1987). Mineral Resources of the Ruby Mountains Wilderness Study Area, Madison County, Montana. United States Government Print. Office.
Cita Chicago (17th ed.)
Tysdal, Russell G., i R. B. Berg. Mineral Resources of the Ruby Mountains Wilderness Study Area, Madison County, Montana. Washington: United States Government Print. Office, 1987.
Cita MLA (9th ed.)
Tysdal, Russell G., i R. B. Berg. Mineral Resources of the Ruby Mountains Wilderness Study Area, Madison County, Montana. United States Government Print. Office, 1987.
Atenció: Aquestes cites poden no estar 100% correctes.