Não informado. (1963). Training directors journal. American Society of Training Directors.
Chicago-Zitierstil (17. Ausg.)Não informado. Training Directors Journal. Alexandria, Va: American Society of Training Directors, 1963.
MLA-Zitierstil (8. Ausg.)Não informado. Training Directors Journal. American Society of Training Directors, 1963.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.