Não informado. (1991). Training and Development. American Society for Training and Development.
Chicago-Zitierstil (17. Ausg.)Não informado. Training and Development. Alexandria, Va: American Society for Training and Development, 1991.
MLA-Zitierstil (8. Ausg.)Não informado. Training and Development. American Society for Training and Development, 1991.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.