APA-ийн эшлэл(7 дахь хэвлэлт)

Weber, W. A., & Wittmann, R. C. (2012). Colorado flora: A guide to the vascular plants (4th ed.). University Press of Colorado.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Weber, William A., ба Ronald C. Wittmann. Colorado Flora: A Guide to the Vascular Plants. 4th ed. Boulder: University Press of Colorado, 2012.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Weber, William A., ба Ronald C. Wittmann. Colorado Flora: A Guide to the Vascular Plants. 4th ed. University Press of Colorado, 2012.