Williams, R. B. (2008). 12 roles of facilitators for school change (2nd ed.). Corwin Press.
Lua i Stíl Chicago (17ú heag.)Williams, R. Bruce. 12 Roles of Facilitators for School Change. 2nd ed. Thousand Oaks, Calif: Corwin Press, 2008.
Lua MLA (9ú heag.)Williams, R. Bruce. 12 Roles of Facilitators for School Change. 2nd ed. Corwin Press, 2008.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.