Sergiovanni, T. J. (1987). The principalship: A reflective practice perspective. Allyn & Bacon.
Lua i Stíl Chicago (17ú heag.)Sergiovanni, Thomas J. The Principalship: A Reflective Practice Perspective. Boston, Mass: Allyn & Bacon, 1987.
Lua MLA (9ú heag.)Sergiovanni, Thomas J. The Principalship: A Reflective Practice Perspective. Allyn & Bacon, 1987.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.