Cita APA (7th ed.)

Smith, D. A. (2009). The trail of gold and silver: Mining in Colorado, 1859-2009. University Press of Colorado.

Cita Chicago (17th ed.)

Smith, Duane A. The Trail of Gold and Silver: Mining in Colorado, 1859-2009. Boulder, Colo.: University Press of Colorado, 2009.

Cita MLA (9th ed.)

Smith, Duane A. The Trail of Gold and Silver: Mining in Colorado, 1859-2009. University Press of Colorado, 2009.