Não informado. (1980). New Directions for Teaching and Learning. Jessey Bass Publishers.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. New Directions for Teaching and Learning. San Francisco, Calif: Jessey Bass Publishers, 1980.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. New Directions for Teaching and Learning. Jessey Bass Publishers, 1980.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.