Robbins, S. P. (1995). Supervision today. Prentice Hall.
Lua i Stíl Chicago (17ú heag.)Robbins, Stephen P. Supervision Today. Englewood Cliffs, N. J: Prentice Hall, 1995.
Lua MLA (9ú heag.)Robbins, Stephen P. Supervision Today. Prentice Hall, 1995.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.