Diyasena, W. (1976). Pre-vocational education in Sri Lanka. Unesco Press.
Lua i Stíl Chicago (17ú heag.)Diyasena, W. Pre-vocational Education in Sri Lanka. Paris: Unesco Press, 1976.
Lua MLA (8ú heag.)Diyasena, W. Pre-vocational Education in Sri Lanka. Unesco Press, 1976.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.