Não informado. (2011). Vocational Education & Training Abstracts. Routledge.
Chicago-referens (17:e uppl.)Não informado. Vocational Education & Training Abstracts. Colchester, Inglaterra: Routledge, 2011.
MLA-referens (8:e uppl.)Não informado. Vocational Education & Training Abstracts. Routledge, 2011.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.