Return on Investment, vol 3. American Society for Training and Development, Alexandria, pp 131-158 Kirkpatrick D (1975) Techniques for Evaluating Training Programs. Return on Investment in der Personalentwicklung: Der 5-Stufen-Evaluationsprozess - Page 280 by Jack J. Phillips, Frank C. Schirmer - 2008 - 282 pages Limited preview -
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