Παραπομπή APA

Kirkpatrick, D. L., & Kirkpatrick, J. D. (2005). Evaluating training programs: The four levels (3rd ed.). San Francisco, CA: Berrett-Koehler.

Παραπομπή Chicago Style

Kirkpatrick, Donald L., and James D. Kirkpatrick. Evaluating Training Programs: The Four Levels. 3rd ed. San Francisco, CA: Berrett-Koehler, 2005.

Παραπομπή MLA

Kirkpatrick, Donald L., and James D. Kirkpatrick. Evaluating Training Programs: The Four Levels. 3rd ed. San Francisco, CA: Berrett-Koehler, 2005.

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