Não informado. (1976). Journal of Vocational Education Research. American Vocational Education Research Association.
Chicago-referens (17:e uppl.)Não informado. Journal of Vocational Education Research. Madison, Wis: American Vocational Education Research Association, 1976.
MLA-referens (8:e uppl.)Não informado. Journal of Vocational Education Research. American Vocational Education Research Association, 1976.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.