Cita APA (7th ed.)
Weber, W. A., & Wittmann, R. C. (2012). Colorado flora: A guide to the vascular plants (4th ed.). University Press of Colorado.
Cita Chicago (17th ed.)
Weber, William A., i Ronald C. Wittmann. Colorado Flora: A Guide to the Vascular Plants. 4th ed. Boulder: University Press of Colorado, 2012.
Cita MLA (9th ed.)
Weber, William A., i Ronald C. Wittmann. Colorado Flora: A Guide to the Vascular Plants. 4th ed. University Press of Colorado, 2012.
Atenció: Aquestes cites poden no estar 100% correctes.