Não informado. (1991). Training and Development. American Society for Training and Development.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Training and Development. Alexandria, Va: American Society for Training and Development, 1991.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Training and Development. American Society for Training and Development, 1991.
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