Não informado. (1980). New Directions for Teaching and Learning. Jessey Bass Publishers.
Chicago-referens (17:e uppl.)Não informado. New Directions for Teaching and Learning. San Francisco, Calif: Jessey Bass Publishers, 1980.
MLA-referens (8:e uppl.)Não informado. New Directions for Teaching and Learning. Jessey Bass Publishers, 1980.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.