Não informado. (1990). Personnel Training and Education. Library Association, Personnel Training and Education Group.
Chicago-referens (17:e uppl.)Não informado. Personnel Training and Education. London: Library Association, Personnel Training and Education Group, 1990.
MLA-referens (8:e uppl.)Não informado. Personnel Training and Education. Library Association, Personnel Training and Education Group, 1990.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.