Heron, J. (1999). The complete facilitator's handbook. Kogan page.
Lua i Stíl Chicago (17ú heag.)Heron, John. The Complete Facilitator's Handbook. USA: Kogan page, 1999.
Lua MLA (9ú heag.)Heron, John. The Complete Facilitator's Handbook. Kogan page, 1999.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.