Gray, H. L. (1979). The school as an organisation. Studies in Education Ltd.
Lua i Stíl Chicago (17ú heag.)Gray, H. L. The School as an Organisation. Driffield: Studies in Education Ltd, 1979.
Lua MLA (8ú heag.)Gray, H. L. The School as an Organisation. Studies in Education Ltd, 1979.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.