DEVERELL C S. (1973). SUPERVISORY DEVELOPMENT. G BELL & SONS.
Lua i Stíl Chicago (17ú heag.)DEVERELL C S. SUPERVISORY DEVELOPMENT. LONDON: G BELL & SONS, 1973.
Lua MLA (9ú heag.)DEVERELL C S. SUPERVISORY DEVELOPMENT. G BELL & SONS, 1973.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.