Kirkpatrick, D. L., & Kirkpatrick, J. D. (2006). Evaluating training programs: The four levels. BK Berrett-Koehler Publ.
Chicago Style (17th ed.) CitationKirkpatrick, Donald L., and James D. Kirkpatrick. Evaluating Training Programs: The Four Levels. BK Berrett-Koehler Publ, 2006.
MLA (8th ed.) CitationKirkpatrick, Donald L., and James D. Kirkpatrick. Evaluating Training Programs: The Four Levels. BK Berrett-Koehler Publ, 2006.
Warning: These citations may not always be 100% accurate.