Não informado. (1970). Challenge in Educational Administration. Alberta Teachers Association.
Lua i Stíl Chicago (17ú heag.)Não informado. Challenge in Educational Administration. Edmonton, Canada: Alberta Teachers Association, 1970.
Lua MLA (8ú heag.)Não informado. Challenge in Educational Administration. Alberta Teachers Association, 1970.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.