APA (7th ed.) Citation

Kirkpatrick, D. L. (1994). Evaluating training programs: The four levels. Berrett-Koehler.

Chicago Style (17th ed.) Citation

Kirkpatrick, Donald L. Evaluating Training Programs: The Four Levels. San Francisco: Berrett-Koehler, 1994.

MLA (9th ed.) Citation

Kirkpatrick, Donald L. Evaluating Training Programs: The Four Levels. Berrett-Koehler, 1994.