Kouzes, J. M., & Posner, B. Z. (2007). The leadership challenge (4th ed.). Jossey-Bass.
Chicago-čujuhus (17. p.)Kouzes, James M., juo Barry Z. Posner. The Leadership Challenge. 4th ed. San Francisco, USA: Jossey-Bass, 2007.
MLA-čujuhus (9. p.)Kouzes, James M., juo Barry Z. Posner. The Leadership Challenge. 4th ed. Jossey-Bass, 2007.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.