APA (7th ed.) Citation

Kirkpatrick, D. L., & Kirkpatrick, J. D. (2006). Evaluating training programs: The four levels (3rd ed.). Berrett - Koehler Publishers, Inc.

Chicago Style (17th ed.) Citation

Kirkpatrick, Donald L., and James D. Kirkpatrick. Evaluating Training Programs: The Four Levels. 3rd ed. San Francisco: Berrett - Koehler Publishers, Inc, 2006.

MLA (9th ed.) Citation

Kirkpatrick, Donald L., and James D. Kirkpatrick. Evaluating Training Programs: The Four Levels. 3rd ed. Berrett - Koehler Publishers, Inc, 2006.