Frohman, D., & Howard, R. (2008). Leadership the hard way: Why leadership can't be taught and how you can learn it anyway. Jossey-Bass.
Chicago-čujuhus (17. p.)Frohman, Dov, juo Robert Howard. Leadership the Hard Way: Why Leadership Can't Be Taught and How You Can Learn It Anyway. San Francisco, CA: Jossey-Bass, 2008.
MLA-čujuhus (9. p.)Frohman, Dov, juo Robert Howard. Leadership the Hard Way: Why Leadership Can't Be Taught and How You Can Learn It Anyway. Jossey-Bass, 2008.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.