Não informado. (1980). New Directions for Teaching and Learning. Jessey Bass Publishers.
Chicago-Zitierstil (17. Ausg.)Não informado. New Directions for Teaching and Learning. San Francisco, Calif: Jessey Bass Publishers, 1980.
MLA-Zitierstil (8. Ausg.)Não informado. New Directions for Teaching and Learning. Jessey Bass Publishers, 1980.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.