APA (7th ed.) Citation

Noel, T. J., & Smith, D. A. (2011). Colorado: The Highest State, Second Edition (2nd ed.). University Press of Colorado.

Chicago Style (17th ed.) Citation

Noel, Thomas J., and Duane A. Smith. Colorado: The Highest State, Second Edition. 2nd ed. Boulder: University Press of Colorado, 2011.

MLA (8th ed.) Citation

Noel, Thomas J., and Duane A. Smith. Colorado: The Highest State, Second Edition. 2nd ed. University Press of Colorado, 2011.