Heifetz, R. A. (1994). Leadership without easy answers. Belknap Press of Harvard University Press.
Lua i Stíl Chicago (17ú heag.)Heifetz, Ronald A. Leadership Without Easy Answers. Cambridge, MA: Belknap Press of Harvard University Press, 1994.
Lua MLA (9ú heag.)Heifetz, Ronald A. Leadership Without Easy Answers. Belknap Press of Harvard University Press, 1994.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.