Weber, W. A., & Wittmann, R. C. (2012). Colorado flora: A guide to the vascular plants (4th ed.). University Press of Colorado.
Chicago-čujuhus (17. p.)Weber, William A., juo Ronald C. Wittmann. Colorado Flora: A Guide to the Vascular Plants. 4th ed. Boulder: University Press of Colorado, 2012.
MLA-čujuhus (9. p.)Weber, William A., juo Ronald C. Wittmann. Colorado Flora: A Guide to the Vascular Plants. 4th ed. University Press of Colorado, 2012.
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