Shaffer, J. C. (2000). The leadership solution. McGraw Hill.
Lua i Stíl Chicago (17ú heag.)Shaffer, James C. The Leadership Solution. New York: McGraw Hill, 2000.
Lua MLA (8ú heag.)Shaffer, James C. The Leadership Solution. McGraw Hill, 2000.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.