Não informado. (1990). New Directions for Adult and Continuing Education. Jessey Bass Publishers.
Chicago-referens (17:e uppl.)Não informado. New Directions for Adult and Continuing Education. San Francisco, Calif: Jessey Bass Publishers, 1990.
MLA-referens (8:e uppl.)Não informado. New Directions for Adult and Continuing Education. Jessey Bass Publishers, 1990.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.