Rowland, V., & Birkett, K. (1992). Personal effectiveness for teachers. Simon and Schuster.
Lua i Stíl Chicago (17ú heag.)Rowland, Val, agus Ken Birkett. Personal Effectiveness for Teachers. Hertfordshire: Simon and Schuster, 1992.
Lua MLA (9ú heag.)Rowland, Val, agus Ken Birkett. Personal Effectiveness for Teachers. Simon and Schuster, 1992.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.