Não informado. (1976). Journal of Vocational Education Research. American Vocational Education Research Association.
Lua i Stíl Chicago (17ú heag.)Não informado. Journal of Vocational Education Research. Madison, Wis: American Vocational Education Research Association, 1976.
Lua MLA (8ú heag.)Não informado. Journal of Vocational Education Research. American Vocational Education Research Association, 1976.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.