Citazione Stile APA (7a Edizione)

Pickering, J. H. (2005). America's Switzerland: Estes Park and Rocky Mountain National Park, the growth years. University Press of Colorado.

Citazione stile Chigago Style (17a edizione)

Pickering, James H. America's Switzerland: Estes Park and Rocky Mountain National Park, the Growth Years. Boulder: University Press of Colorado, 2005.

Citatione MLA (9a ed.)

Pickering, James H. America's Switzerland: Estes Park and Rocky Mountain National Park, the Growth Years. University Press of Colorado, 2005.