Não informado. (1963). Training directors journal. American Society of Training Directors.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Training Directors Journal. Alexandria, Va: American Society of Training Directors, 1963.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Training Directors Journal. American Society of Training Directors, 1963.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.