Laugen, R. T. (2010). The gospel of progressivism: Moral reform and labor war in Colorado, 1900-1930. University Press of Colorado.
Chicago-čujuhus (17. p.)Laugen, R. Todd. The Gospel of Progressivism: Moral Reform and Labor War in Colorado, 1900-1930. Boulder, CO: University Press of Colorado, 2010.
MLA-čujuhus (9. p.)Laugen, R. Todd. The Gospel of Progressivism: Moral Reform and Labor War in Colorado, 1900-1930. University Press of Colorado, 2010.
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