Cita APA (7a ed.)

Sprague, M. (1976). Colorado: A bicentennial history. Norton.

Cita Chicago Style (17a ed.)

Sprague, Marshall. Colorado: A Bicentennial History. New York: Norton, 1976.

Cita MLA (8a ed.)

Sprague, Marshall. Colorado: A Bicentennial History. Norton, 1976.