Hughes, R. L. (1999). Leadership enchanging the lessons of experience. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Hughes, Richard L. Leadership Enchanging the Lessons of Experience. McGraw-Hill, 1999.
Lua MLA (8ú heag.)Hughes, Richard L. Leadership Enchanging the Lessons of Experience. McGraw-Hill, 1999.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.