Kirkpatrick, D. L., & Kirkpatrick, J. D. (2005). Evaluating training programs: The four levels (3rd ed.). Berrett-Koehler.
Citace podle Chicago (17th ed.)Kirkpatrick, Donald L., a James D. Kirkpatrick. Evaluating Training Programs: The Four Levels. 3rd ed. San Francisco, Calif: Berrett-Koehler, 2005.
Citace podle MLA (9th ed.)Kirkpatrick, Donald L., a James D. Kirkpatrick. Evaluating Training Programs: The Four Levels. 3rd ed. Berrett-Koehler, 2005.
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